Description
In the Linux kernel, the following vulnerability has been resolved: crypto: af-alg - fix NULL pointer dereference in scatterwalk The AF_ALG interface fails to unmark the end of a Scatter/Gather List (SGL) when chaining a new af_alg_tsgl structure. If a sendmsg() fills an SGL exactly to MAX_SGL_ENTS, the last entry is marked as the end. A subsequent sendmsg() allocates a new SGL and chains it, but fails to clear the end marker on the previous SGL's last data entry. This causes the crypto scatterwalk to hit a premature end, returning NULL on sg_next() and leading to a kernel panic during dereference. Fix this by explicitly unmarking the end of the previous SGL when performing sg_chain() in af_alg_alloc_tsgl().
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
8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < f48d3dd99199180cf37d6253550c55e86372309aaffected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < f9acceae7b004956851fd4268edf9f518a9bce04affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 7195350fb78538c25cd790d703f8f2c73ee0d395affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 44eafa39363e8d5dfda6a8c6eb6b45458ed4b948affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 00cbdec17c15d024a1c5002c7365df7624a18a75affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 4b03ab0a587ec57eb7ddb5c115d84a42896f60f7affected8ff590903d5fc7f5a0a988c38267a3d08e6393a2 to < 62397b493e14107ae82d8b80938f293d95425bcbaffected
Linux Linux
Default version status: affected
2.6.38affected0 to < 2.6.38unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.168 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/f48d3dd99199180cf37d6253550c55e86372309a ↗
- https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04 ↗
- https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395 ↗
- https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49 ↗
- https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948 ↗
- https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75 ↗
- https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7 ↗
- https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb ↗