Low

Gnutls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal

Type: advisorySource: Official CVE List1 source record

A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This timing side-channel could allow a remote attacker to potentially leak sensitive information about the padding bytes through observable timing differences. This vulnerability is a form of information disclosure.

Announced 1 Jun 2026Source revision 1

Original source ↗

CVE-2026-5419

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-5419

Red Hat Enterprise Linux 10

Source reference: /containers/cna/affected/1/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 10.0 Extended Update Support

Source reference: /containers/cna/affected/2/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9

Source reference: /containers/cna/affected/3/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9

Source reference: /containers/cna/affected/4/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Source reference: /containers/cna/affected/5/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9.6 Extended Update Support

Source reference: /containers/cna/affected/6/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.17

Source reference: /containers/cna/affected/7/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.17

Source reference: /containers/cna/affected/8/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.17

Source reference: /containers/cna/affected/9/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.17

Source reference: /containers/cna/affected/10/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.18

Source reference: /containers/cna/affected/11/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.18

Source reference: /containers/cna/affected/12/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.18

Source reference: /containers/cna/affected/13/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.18

Source reference: /containers/cna/affected/14/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.18

Source reference: /containers/cna/affected/15/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Cert Manager support for Red Hat OpenShift release 1.20

Source reference: /containers/cna/affected/16/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Discovery 2

Source reference: /containers/cna/affected/17/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Discovery 2

Source reference: /containers/cna/affected/18/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Hardened Images

Source reference: /containers/cna/affected/19/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift AI 3.4

Source reference: /containers/cna/affected/20/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/21/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/22/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/23/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/24/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/25/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/26/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Update Infrastructure 5

Source reference: /containers/cna/affected/27/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 6

Source reference: /containers/cna/affected/28/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 7

Source reference: /containers/cna/affected/29/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8

Source reference: /containers/cna/affected/30/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4

Source reference: /containers/cna/affected/31/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4

Source reference: /containers/cna/affected/32/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4

Source reference: /containers/cna/affected/33/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "versions": [
      {
        "status": "affected",
        "version": "0"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://gitlab.com/gnutls/gnutls"
  },
  {
    "cpes": [
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.10-4.el10_2",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.9-9.el10_0.19",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
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      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.10-4.el9_8",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:9::appstream",
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.10-4.el9_8",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhel_e4s:9.4::appstream",
      "cpe:/o:redhat:rhel_e4s:9.4::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.3-4.el9_4.6",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.6::appstream",
      "cpe:/o:redhat:rhel_eus:9.6::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:3.8.3-6.el9_6.4",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791371080",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/jetstack-cert-manager-acmesolver-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791371069",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/jetstack-cert-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791788287",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-operator-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791970484",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-operator-bundle",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.18::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791459707",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/jetstack-cert-manager-acmesolver-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.18::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791459711",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/jetstack-cert-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
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    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.18",
    "versions": [
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        "version": "1791459759",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-istio-csr-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.18::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "1789029076",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-operator-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.18::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "1791966259",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-operator-bundle",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:cert_manager:1.20::el9"
    ],
    "vendor": "Red Hat",
    "product": "Cert Manager support for Red Hat OpenShift release 1.20",
    "versions": [
      {
        "status": "unaffected",
        "version": "1790598593",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "cert-manager/cert-manager-trust-manager-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:discovery:2::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Discovery 2",
    "versions": [
      {
        "status": "unaffected",
        "version": "1782159791",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "discovery/discovery-server-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:discovery:2::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Discovery 2",
    "versions": [
      {
        "status": "unaffected",
        "version": "1782166952",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "discovery/discovery-ui-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:hummingbird:1"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Hardened Images",
    "versions": [
      {
        "status": "unaffected",
        "version": "3.8.13-1.hum1",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "gnutls-main",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift_ai:3.4::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift AI 3.4",
    "versions": [
      {
        "status": "unaffected",
        "version": "1790703542",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhai/base-image-neuron-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1781525684",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/cds-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1781525671",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/haproxy-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1781525693",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/installer-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1781525739",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/rhua-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1787241211",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/cds-kubernetes-tp-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1787135742",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/installer-tp-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:rhui:5::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Update Infrastructure 5",
    "versions": [
      {
        "status": "unaffected",
        "version": "1787241260",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "rhui5/rhua-tp-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unaffected"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "packageName": "gnutls",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "packageName": "openshift4/ose-hypershift-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unaffected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "packageName": "openshift/ose-rhel-coreos-8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4",
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]

Related CVEs: CVE-2026-5419
Source reference: /cveMetadata/cveId

Publisher severity

low

Source reference: /containers/cna/metrics

Event: #23112 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 06:13:09 GMT
Publisher date: Mon, 01 Jun 2026 19:26:56 GMT

Read the original announcement