CVE-2026-80875
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.
Affected versions
Linux kernel versions
2.6.28
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.97,
6.18.40,
7.1.5,
7.2
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-80875?
CVE-2026-80875 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.28 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-80875 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80875?
Yes. CVE-2026-80875 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80875 actively exploited?
No. CVE-2026-80875 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.