CVEvulnerability
CVE-2026-98089
- Status
- Undergoing Analysis
- Published
- 2026-09-25
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In 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().
References
- https://git.kernel.org/stable/c/27314f96d29b54e815e7a9b84c3273f1895e68e2 git.kernel.org
- https://git.kernel.org/stable/c/3b178894931a268c09126a5b53630f343e10e296 git.kernel.org
- https://git.kernel.org/stable/c/70f3995830d3f1e79faa14eb0605914f778feca9 git.kernel.org
- https://git.kernel.org/stable/c/7adb1bf25b0c5cedfb49b6e82844394d4f3c0d99 git.kernel.org
- https://git.kernel.org/stable/c/862c8eb6947689c44fe11353755576a3672563a5 git.kernel.org
- https://git.kernel.org/stable/c/e39cf90bd856443542b97933289749fca07476bf git.kernel.org