bonding: alb: fix uninitialized transport header access in alb_determine_nd()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98089
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:38 UTC
Updated2026-09-25 11:17:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix uninitialized transport header access in alb_determine_nd() alb_determine_nd() uses icmp6_hdr(skb) to inspect ICMPv6 headers. However, in xmit paths (e.g. packets sent via AF_PACKET / raw sockets or forwarded packets), skb->transport_header is not guaranteed to be initialized. While pskb_network_may_pull() ensures the packet data is linear starting from the network header, it does not set or adjust the transport header offset. Dereferencing icmp6_hdr(skb) can therefore access out-of-bounds memory. Fetch the icmp6hdr directly after ipv6hdr following pskb_network_may_pull(), and reload ipv6hdr in case pskb_may_pull() reallocated skb->head. Also remove the unused bond argument from alb_determine_nd().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 e39cf90bd856443542b97933289749fca07476bf git Not specified
CNA Linux Linux affected 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 27314f96d29b54e815e7a9b84c3273f1895e68e2 git Not specified
CNA Linux Linux affected 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 3b178894931a268c09126a5b53630f343e10e296 git Not specified
CNA Linux Linux affected 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 70f3995830d3f1e79faa14eb0605914f778feca9 git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/27314f96d29b54e815e7a9b84c3273f1895e68e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/70f3995830d3f1e79faa14eb0605914f778feca9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3b178894931a268c09126a5b53630f343e10e296 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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