imPC@ndo IT

Tracker / CVE-2026-43057

CVE-2026-43057

High 7.5

In the Linux kernel, the following vulnerability has been resolved: net: correctly handle tunneled traffic on IPV6_CSUM GSO fallback NETIF_F_IPV6_CSUM only advertises support for checksum offload of packets without IPv6 extension headers. Packets with extension headers must fall back onto software checksumming. Since TSO depends on checksum offload, those must revert to GSO. The below commit introduces that fallback. It always checks network header length. For tunneled packets, the inner header length must be checked instead. Extend the check accordingly. A special case is tunneled packets without inner IP protocol. Such as RFC 6951 SCTP in UDP. Those are not standard IPv6 followed by transport header either, so also must revert to the software GSO path.

Affected products and versions

linux linux_kernel
linux linux_kernel · 6.1.149 → 6.1.168
linux linux_kernel · 6.12.44 → 6.12.81
linux linux_kernel · 6.16.4 → 6.17
linux linux_kernel · 6.17.1 → 6.18.22
linux linux_kernel · 6.19 → 6.19.12
linux linux_kernel · 6.6.103 → 6.6.134

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References