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ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap() xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route. If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries. Release the dst before jumping to the drop path.

Announced Source revision 1
Original source ↗

CVE-2026-46172

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-2026-46172

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": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "a0721bcd72641c32b281f227a94505b31cf54117",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "a20b34f6e854fe6f2aa82528fae7a88759919eb4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "870560015ce6e0d8f841c6a8aba33c44be52c727",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "c2efc4956981066df2fef1cc77391b523db6d8e4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "9d5047782f9bd2829e529df69209bf3232eb561f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "6a5eec0a2a0e99ec9743cf8f1c4082178811d90a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0146dca70b877b73c5fd9c67912b8a0ca8a7bac7",
        "lessThan": "bc0fcb9823cd0894934cf968b525c575833d7078",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ipv6/xfrm6_protocol.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.88",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.30",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv6/xfrm6_protocol.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46172

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28403 · Revision 1
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Publisher date
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