CVE-2026-80875
Description
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.
How to fix
- Linux Linux2d06e0897ce18228d199887f0823b431d841dd03, 816efb7fc0aeae986e63ac73b428dd97a4ef69f5, 5848e914b85e360a2dd9d19c00a72e2ea9617dd0, d45f73c274435703e8d7bc9d8b742a5d9111ab6e, f6f550f26562d191c30b2818e7925dcb1c7f166c, d73f4249776dd970ad65a69cfc51613dd8a034bb, c2ee845e292c278fac75bf28d96bc892607fd5c4, 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < 2d06e0897ce18228d199887f0823b431d841dd03, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < 816efb7fc0aeae986e63ac73b428dd97a4ef69f5, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < 5848e914b85e360a2dd9d19c00a72e2ea9617dd0, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < d45f73c274435703e8d7bc9d8b742a5d9111ab6e, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < f6f550f26562d191c30b2818e7925dcb1c7f166c, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < d73f4249776dd970ad65a69cfc51613dd8a034bb, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < c2ee845e292c278fac75bf28d96bc892607fd5c4, 0bbdd42b7efa66685b6d74701bcde3a596a3a59d ≤ v < 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2, 2.6.28 | 2d06e0897ce18228d199887f0823b431d841dd03, 816efb7fc0aeae986e63ac73b428dd97a4ef69f5, 5848e914b85e360a2dd9d19c00a72e2ea9617dd0, d45f73c274435703e8d7bc9d8b742a5d9111ab6e, f6f550f26562d191c30b2818e7925dcb1c7f166c, d73f4249776dd970ad65a69cfc51613dd8a034bb, c2ee845e292c278fac75bf28d96bc892607fd5c4, 2500fa3958b1ba51c2b065e39db1b04dfa7e23a2 |
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