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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a0478d7e888028f85fa7785ea838ce0ca09398e2 to < 2094a7cf91b71367b649f991aacc7b579f793d0baffected2156d9e9f2e483c8c3906c0ea57ea312c1424235 to < ed71cf465c75f5688b07a35d373cd1d6b589c8eaaffected041e2f945f82fdbd6fff577b79c33469430297aa to < 33670f780e0120c3dacda188c512bbffe0b6044caffected864e3396976ef41de6cc7bc366276bf4e084fff2 to < a98b78116a27e2a57b696b569b2cb431c95cf9b6affected864e3396976ef41de6cc7bc366276bf4e084fff2 to < 732fdeb2987c94b439d51f5cb9addddc2fc48c42affected864e3396976ef41de6cc7bc366276bf4e084fff2 to < c4336a07eb6b2526dc2b62928b5104b41a7f81f5affected794ddbb7b63b6828c75967b9bcd43b086716e7a1affected6.1.149 to < 6.1.168affected6.6.103 to < 6.6.134affected6.12.44 to < 6.12.81affected6.16.4 to < 6.17affected
Linux Linux
Default version status: affected
6.17affected0 to < 6.17unaffected6.1.168 to ≤ 6.1.*unaffected6.6.134 to ≤ 6.6.*unaffected6.12.81 to ≤ 6.12.*unaffected6.18.22 to ≤ 6.18.*unaffected6.19.12 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2094a7cf91b71367b649f991aacc7b579f793d0b ↗
- https://git.kernel.org/stable/c/ed71cf465c75f5688b07a35d373cd1d6b589c8ea ↗
- https://git.kernel.org/stable/c/33670f780e0120c3dacda188c512bbffe0b6044c ↗
- https://git.kernel.org/stable/c/a98b78116a27e2a57b696b569b2cb431c95cf9b6 ↗
- https://git.kernel.org/stable/c/732fdeb2987c94b439d51f5cb9addddc2fc48c42 ↗
- https://git.kernel.org/stable/c/c4336a07eb6b2526dc2b62928b5104b41a7f81f5 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗