ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()
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.
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
- Added to Heist Feed
- Publisher date