CVE-2022-49291
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,…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.30% probability · 23th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8Patch
- https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8Patch
- https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7bPatch
- https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438Patch
- https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cbPatch
- https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9Patch
- https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092Patch
- https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.