CVE-2026-80875
ipvs: use parsed transport offset in TCP state lookup
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.
INFO
Published Date :
Sept. 4, 2026, 5:16 p.m.
Last Modified :
Sept. 4, 2026, 5:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-80875
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to the latest version.
- Apply the patch for the IPVS TCP state lookup fix.
- Ensure correct transport header offset is used.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-80875.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-80875 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-80875
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-80875 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-80875 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 04, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80875.json">CVE-2026-80875</a> Added Reference https://git.kernel.org/stable/c/2500fa3958b1ba51c2b065e39db1b04dfa7e23a2 Added Reference https://git.kernel.org/stable/c/2d06e0897ce18228d199887f0823b431d841dd03 Added Reference https://git.kernel.org/stable/c/5848e914b85e360a2dd9d19c00a72e2ea9617dd0 Added Reference https://git.kernel.org/stable/c/816efb7fc0aeae986e63ac73b428dd97a4ef69f5 Added Reference https://git.kernel.org/stable/c/c2ee845e292c278fac75bf28d96bc892607fd5c4 Added Reference https://git.kernel.org/stable/c/d45f73c274435703e8d7bc9d8b742a5d9111ab6e Added Reference https://git.kernel.org/stable/c/d73f4249776dd970ad65a69cfc51613dd8a034bb Added Reference https://git.kernel.org/stable/c/f6f550f26562d191c30b2818e7925dcb1c7f166c