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ecryptfs: reject too-small tag 70 packets

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed fields can underflow that size calculation. Reject tag 70 packets before the subtraction unless the body contains the signature, cipher code, and at least one byte of encrypted filename data.

Announced Source revision 1
Original source ↗

CVE-2026-89606

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-2026-89606

Linux

Source reference: /containers/cna/affected/0/product

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

Linux

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

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "df5f375a6151ef71f636da044bcef90c26697255",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "5668121974eb7f7aa82793a9d0d13abadb8904dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "2e5afed9503dd1d85004c09503adc2cb584c0188",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "414a0f04feb06f03523edf7e2a8be1d7f1a9b160",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "9d88391bbed76eb091cddd50b0af87b1c6f22589",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "b31da1ecf13929a8d7f8d2727843d2fe35396b75",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "d2869768eab5648e6edc05f47e0716e5328e6681",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c79f34f7ee71cd28272332b424ca64b2be006ab",
        "lessThan": "e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/ecryptfs/keystore.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.29"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.29",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/ecryptfs/keystore.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89606

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#35112 · Revision 1
Added to Heist Feed
Publisher date
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