CVE-2026-43057

Vulnerability overview

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...

Affected product and versions

Product

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

Affected versions

>= a0478d7e888028f85fa7785ea838ce0ca09398e2 < 2094a7cf91b71367b649f991aacc7b579f793d0b, >= 2156d9e9f2e483c8c3906c0ea57ea312c1424235 < ed71cf465c75f5688b07a35d373cd1d6b589c8ea, >= 041e2f945f82fdbd6fff577b79c33469430297aa < 33670f780e0120c3dacda188c512bbffe0b6044c, >= 864e3396976ef41de6cc7bc366276bf4e084fff2 < a98b78116a27e2a57b696b569b2cb431c95cf9b6, >= 864e3396976ef41de6cc7bc366276bf4e084fff2 < 732fdeb2987c94b439d51f5cb9addddc2fc48c42, >= 864e3396976ef41de6cc7bc366276bf4e084fff2 < c4336a07eb6b2526dc2b62928b5104b41a7f81f5, >= 794ddbb7b63b6828c75967b9bcd43b086716e7a1, >= 6.1.149 < 6.1.168, >= 6.6.103 < 6.6.134, >= 6.12.44 < 6.12.81, >= 6.16.4 < 6.17, >= 6.17, >= V3.1.6, >= V3.1.5, > 6.17.1 < 6.18.22, >= 6.19 < 6.19.12, 6.17, 7.0

Fixed versions

6.1.168, 6.6.134, 6.12.81, 6.17, 6.18.22, 6.19.12

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

Not available