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openvswitch: avoid reallocating confirmed conntrack labels

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: openvswitch: avoid reallocating confirmed conntrack labels ovs_ct_get_conn_labels() adds the labels extension when a conntrack entry does not have one. Confirmed conntracks can be read locklessly, so adding an extension may reallocate and free the extension block while another CPU accesses it. Only add the extension for unconfirmed conntracks. A confirmed conntrack without labels now fails the caller's label operation instead of reallocating its extension storage.

Announced Source revision 1
Original source ↗

CVE-2026-98251

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-2026-98251

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": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "4371d79ea74407fb992c985b1f94391e35bb8289",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "7ff688aceada1160331a789385ea146f62fbddf7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "05eab8dced6bf4d3009a6eeee16ddac99047dc83",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "579d87ec1e1e85729a6cb2c25961e58beb78640c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "2e6dd889c325abf23821e1459c3ffef59b7f0009",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "d16f089bd700f45d720ce989d5495e1dc3be0cf8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "8c9fcc6c33950d3db551af664d1fd3d998bfee56",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c2ac667358708d7cce64c78f58af6adf4c1e848b",
        "lessThan": "3f118c8217c109fd13ca61caa301d72c483897ef",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/openvswitch/conntrack.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/openvswitch/conntrack.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98251

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#38330 · Revision 1
Added to Heist Feed
Publisher date
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