Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent hw_params and hw_free calls Currently we have neither proper check nor protection against the concurrent calls of PCM hw_params and hw_free ioctls, which may result in a UAF. Since the existing PCM stream lock can't be used for protecting the whole ioctl operations, we need a new mutex to protect those racy calls. This patch introduced a new mutex, runtime->buffer_mutex, and applies it to both hw_params and hw_free ioctl code paths. Along with it, the both functions are slightly modified (the mmap_count check is moved into the state-check block) for code simplicity.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a42aa926843acca96c0dfbde2e835b8137f2f092; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before fbeb492694ce0441053de57699e1e2b7bc148a69; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 33061d0fba51d2bf70a2ef9645f703c33fe8e438; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0090c13cbbdffd7da079ac56f80373a9a1be0bf8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1bbf82d9f961414d6c76a08f7f843ea068e0ab7b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 92ee3c60ec9fe64404dc035e7c41277d74aa26cb |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.14.279 through 4.14.*; unaffected 4.19.243 through 4.19.*; unaffected 5.4.193 through 5.4.*; unaffected 5.10.109 through 5.10.*; unaffected 5.15.32 through 5.15.*; unaffected 5.16.18 through 5.16.*; unaffected 5.17.1 through 5.17.*; unaffected 5.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092
- https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9
- https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69
- https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8
- https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438
- https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8
- https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b
- https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb
ADP enrichment
No English description supplied.
No references supplied.