vxlan: use neigh_ha_snapshot() in route_shortcircuit()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74475
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:52 UTC
Updated2026-08-15 13:17:52 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapshot() in route_shortcircuit() The neighbour hardware address n->ha can be updated asynchronously by the neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without holding the seqlock loop can lead to torn reads or reading a partially updated MAC address. Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under read_seqbegin()/read_seqretry() lock protection before using it. Note that arp_reduce() and neigh_reduce() seem to have the same issue left for future patches.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e4f67addf158f98f8197e08974966b18480dc751 d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0 git Not specified
CNA Linux Linux affected e4f67addf158f98f8197e08974966b18480dc751 ec341bb76d77b4c2948764375ee6bfeef4bb41c3 git Not specified
CNA Linux Linux affected e4f67addf158f98f8197e08974966b18480dc751 ff89415d34c3ab9f5312316423122e664ed3524f git Not specified
CNA Linux Linux affected e4f67addf158f98f8197e08974966b18480dc751 05f2987f73daa05333fd713d05546142f9f7c5f0 git Not specified
CNA Linux Linux affected e4f67addf158f98f8197e08974966b18480dc751 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ec341bb76d77b4c2948764375ee6bfeef4bb41c3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ff89415d34c3ab9f5312316423122e664ed3524f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/05f2987f73daa05333fd713d05546142f9f7c5f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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