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

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Summary

CVECVE-2026-46172
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:32 UTC
Updated2026-05-28 13:44:01 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.051520000 (date 2026-05-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 c2efc4956981066df2fef1cc77391b523db6d8e4 git Not specified
CNA Linux Linux affected 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 git Not specified
CNA Linux Linux affected 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 9d5047782f9bd2829e529df69209bf3232eb561f git Not specified
CNA Linux Linux affected 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 6a5eec0a2a0e99ec9743cf8f1c4082178811d90a git Not specified
CNA Linux Linux affected 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 bc0fcb9823cd0894934cf968b525c575833d7078 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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