What’s Vulnerable › Vulnerabilities

CVE-2026-68477: ipvs: fix more places with wrong ipv6 transport offsets

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-19
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix more places with wrong ipv6 transport offsets Sashiko reports for more incorrect IPv6 transport offsets. The app code for TCP was assuming IPv4 network header even after the ipvsh argument was provided. This can cause problems with apps over IPv6. As for the only official app in the kernel tree (FTP) this problem is harmless because we use Netfilter to mangle the FTP ports and we do not adjust the TCP seq numbers. Also, provide correct offset of the ICMPV6 header in ip_vs_out_icmp_v6() for correct checksum checks when the IPv6 packet has extension headers.

Affected products

• Linux kernel: 2.6.28 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3a9dc9b55b53d94613a587604b77d3b20024090c
• https://git.kernel.org/stable/c/613ce63711b8d431bba90781f133c39a21684f87
• https://git.kernel.org/stable/c/7350eb7ead172ae8024897d4b0f2e15c5318279c
• https://git.kernel.org/stable/c/905d7a363ade96a19f214815361e11981142c547
• https://git.kernel.org/stable/c/95d4511d81b2b37e5d2bdde5d912e48243eae517
• https://git.kernel.org/stable/c/a3f0d5b605cd5da5c95279969fb8cea4e55cee5b
• https://git.kernel.org/stable/c/b3fe4cbd583895987935a9bdad01c8f9d3a02310
• https://git.kernel.org/stable/c/d4ec18f48ce78a3bf7c999ac908691007375fe99

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