CVE-2026-80875 is a vulnerability in Linux Kernel
Published on September 4, 2026
ipvs: use parsed transport offset in TCP state lookup
In the Linux kernel, the following vulnerability has been resolved:
ipvs: use parsed transport offset in TCP state lookup
TCP state handling reparses the skb to find the TCP header. For IPv6 it
uses sizeof(struct ipv6hdr), while the surrounding IPVS code already
parsed the packet with ip_vs_fill_iph_skb() and has the real
transport-header offset in iph.len.
This makes TCP state handling look at the wrong bytes when an IPv6
packet carries extension headers. Use the parsed transport offset passed
down from ip_vs_set_state() when reading the TCP header.
For IPv4 and for IPv6 packets without extension headers, the passed
offset matches the previous value.
Products Associated with CVE-2026-80875
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Affected Versions
Linux:- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below 2d06e0897ce18228d199887f0823b431d841dd03 is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below 816efb7fc0aeae986e63ac73b428dd97a4ef69f5 is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below 5848e914b85e360a2dd9d19c00a72e2ea9617dd0 is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below d45f73c274435703e8d7bc9d8b742a5d9111ab6e is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below f6f550f26562d191c30b2818e7925dcb1c7f166c is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below d73f4249776dd970ad65a69cfc51613dd8a034bb is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below c2ee845e292c278fac75bf28d96bc892607fd5c4 is affected.
- Version 0bbdd42b7efa66685b6d74701bcde3a596a3a59d and below 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2 is affected.
- Version 2.6.28 is affected.
- Before 2.6.28 is unaffected.
- Version 5.10.261, <= 5.10.* is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.97, <= 6.12.* is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.