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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43057 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/2094a7cf91b71367b649f991aacc7b579f793d0b kernel.org Patch 
https://git.kernel.org/stable/c/33670f780e0120c3dacda188c512bbffe0b6044c kernel.org Patch 
https://git.kernel.org/stable/c/732fdeb2987c94b439d51f5cb9addddc2fc48c42 kernel.org Patch 
https://git.kernel.org/stable/c/a98b78116a27e2a57b696b569b2cb431c95cf9b6 kernel.org Patch 
https://git.kernel.org/stable/c/c4336a07eb6b2526dc2b62928b5104b41a7f81f5 kernel.org Patch 
https://git.kernel.org/stable/c/ed71cf465c75f5688b07a35d373cd1d6b589c8ea kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43057
NVD Published Date:
05/01/2026
NVD Last Modified:
05/06/2026
Source:
kernel.org