CVE-2026-68477: ipvs: fix more places with wrong ipv6 transport offsets
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 ipvsouticmpv6() for correct checksum checks when the IPv6 packet has extension headers.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68477?
The severity of CVE-2026-68477 is rated as 23.
How does CVE-2026-68477 affect Linux kernel network performance?
CVE-2026-68477 affects the Linux kernel by causing potential incorrect handling of IPv6 transport offsets, leading to network issues.
How do I fix CVE-2026-68477?
To fix CVE-2026-68477, update to the latest version of the Linux kernel that includes the patch addressing this vulnerability.
What is the risk associated with CVE-2026-68477 on systems using IPv6?
The risk associated with CVE-2026-68477 on systems using IPv6 includes potential misbehavior in network traffic handling.
Is CVE-2026-68477 present in previous versions of the Linux kernel?
Yes, CVE-2026-68477 may be present in earlier versions of the Linux kernel prior to the patch release.