CVE-2026-68477
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
In the Linux kernel's IPVS, there are errors in calculating IPv6 transport offsets. The TCP app code assumed an IPv4 network header, which can cause issues with apps over IPv6. The ICMPV6 header offset was also corrected.
Risk Assessment
Incorrect offsets may cause malfunction of applications over IPv6, but the practical impact is limited.
Recommendation
Apply a kernel patch that fixes IPv6 transport offsets in IPVS.
Original NVD description (English source)
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.