CVE-2026-68477 ipvs: fix more places with wrong ipv6 transport offsets
Incorrect IPv6 transport offsets in the Linux kernel IPVS module can cause issues with IPv6 applications, potentially leading to service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68477?
CVE-2026-68477 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2026-68477?
How do I fix CVE-2026-68477?
Apply the vendor's patch.
Is CVE-2026-68477 being exploited?
There is no known exploitation of CVE-2026-68477 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68477, DEBIAN-CVE-2026-68477, GHSA-g55r-28w7-4fjw, UBUNTU-CVE-2026-68477.