CVE-2022-49291

Advisory lineage Upstream: 0 Downstream: 13
Analyzed
Published: 26 Feb 2025, 01:56
Last modified:11 May 2026, 18:56

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Feb 2025, 01:56
Published
Vulnerability first disclosed
11 May 2026, 18:56
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a42aa926843acca96c0dfbde2e835b8137f2f092 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fbeb492694ce0441053de57699e1e2b7bc148a69 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 33061d0fba51d2bf70a2ef9645f703c33fe8e438 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0090c13cbbdffd7da079ac56f80373a9a1be0bf8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1bbf82d9f961414d6c76a08f7f843ea068e0ab7b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 92ee3c60ec9fe64404dc035e7c41277d74aa26cb | 2.6.12

  • linux•linux_kernel

    < 4.14.279 | ≥ 4.15, < 4.19.243 | ≥ 4.20, < 5.4.193 | ≥ 5.5, < 5.10.109 | ≥ 5.11, < 5.15.32 | ≥ 5.16, < 5.16.18 | ≥ 5.17, < 5.17.1

References (8)