Skip to content
Heist/ feed
High

netfilter: nf_conntrack_sip: validate skb_dst() before accessing it

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash.

Announced Source revision 1
Original source ↗

CVE-2026-72253

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-2026-72253

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": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "7866116a040b3a23fb094e7d8f7ea3d61b3ac70b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "c5ef7228be04518d95591fc5369a9c554b19756d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "0aec339694a56e263d4b22475ff7211d40900830",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "e64a48c50a1ff565a98c6a98d82b5b942868e76e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "c199ed687c00841daf60e9d131976958583a8c09",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "09755dc62b026076b1d47f83489eb0547c8135e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "b843a96252f672332837ea2ecb7c8db0acf68e20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cae3a2627520c3795b54533c5328b77af3405dbe",
        "lessThan": "e5e24a365a5e024efef63cc49abb345fbd4852c5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_conntrack_sip.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": "5.10.266",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.217",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.184",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_conntrack_sip.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72253

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#32997 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement