Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix race of buffer access at PCM OSS layer The PCM OSS layer tries to clear the buffer with the silence data at initialization (or reconfiguration) of a stream with the explicit call of snd_pcm_format_set_silence() with runtime->dma_area. But this may lead to a UAF because the accessed runtime->dma_area might be freed concurrently, as it's performed outside the PCM ops. For avoiding it, move the code into the PCM core and perform it inside the buffer access lock, so that it won't be changed during the operation.
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
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c0e05a76fc727929524ef24a19c302e6dd40233faffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8170d8ec4efd0be352c14cb61f374e30fb0c2a25affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 10217da9644ae75cea7330f902c35fc5ba78bbbfaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f3e14d706ec18faf19f5a6e75060e140fea05d4aaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 74d90875f3d43f3eff0e9861c4701418795d3455affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < bf85e49aaf3a3c5775ea87369ea5f159c2148db4affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < afa56c960fcb4db37f2e3399f28e9402e4e1f470affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 93a81ca0657758b607c3f4ba889ae806be9beb73affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.4.294 to ≤ 5.4.*unaffected5.10.238 to ≤ 5.10.*unaffected5.15.185 to ≤ 5.15.*unaffected6.1.141 to ≤ 6.1.*unaffected6.6.93 to ≤ 6.6.*unaffected6.12.31 to ≤ 6.12.*unaffected6.14.9 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c0e05a76fc727929524ef24a19c302e6dd40233f ↗
- https://git.kernel.org/stable/c/8170d8ec4efd0be352c14cb61f374e30fb0c2a25 ↗
- https://git.kernel.org/stable/c/10217da9644ae75cea7330f902c35fc5ba78bbbf ↗
- https://git.kernel.org/stable/c/f3e14d706ec18faf19f5a6e75060e140fea05d4a ↗
- https://git.kernel.org/stable/c/74d90875f3d43f3eff0e9861c4701418795d3455 ↗
- https://git.kernel.org/stable/c/bf85e49aaf3a3c5775ea87369ea5f159c2148db4 ↗
- https://git.kernel.org/stable/c/afa56c960fcb4db37f2e3399f28e9402e4e1f470 ↗
- https://git.kernel.org/stable/c/93a81ca0657758b607c3f4ba889ae806be9beb73 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗