What’s Vulnerable › Vulnerabilities

CVE-2026-45850: ipvs: skip ipv6 extension headers for csum checks

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: skip ipv6 extension headers for csum checks Protocol checksum validation fails for IPv6 if there are extension headers before the protocol header. iph->len already contains its offset, so use it to fix the problem.

Affected products

• Linux kernel: from 2.6.28 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.12.94, 6.18.36, 6.19.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.12.94. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/05cfe9863ef049d98141dc2969eefde72fb07625
• https://git.kernel.org/stable/c/0bf92a90bf05ecafe52e92d5bc15a585021a64ac
• https://git.kernel.org/stable/c/54add3b7d3c154ca89ef5bac2582b0ed1a3a15d5
• https://git.kernel.org/stable/c/768f665f3685b455ed686370ed7ccb852a125a3b
• https://git.kernel.org/stable/c/9aa7edc1347b98774e5167ca34e5b8aa6083bde7
• https://git.kernel.org/stable/c/a3ca27762ce8476b4fbf9b2a8f5cb74c38e483e4
• https://git.kernel.org/stable/c/cdce1e797addab72393c0dfee31aaca41ef7d937
• https://git.kernel.org/stable/c/d643c1ec80b70508f54dac12179e36920e2c00de
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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