7.8

CVE-2022-49291: ALSA: pcm: Fix races among concurrent hw_params and hw_free calls

Analyzed
AliasesUBUNTU-CVE-2022-49291DEBIAN-CVE-2022-49291
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49291 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 9
RHSA-2022:8267RHSA-2024:4107SUSE-SU-2025:0983-1SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability 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

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.15.0-191.202 | < 5.4.0-124.140 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1139.150 | < 5.4.0-1083.90 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a42aa926843acca96c0dfbde2e835b8137f2f092 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fbeb492694ce0441053de57699e1e2b7bc148a69 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 33061d0fba51d2bf70a2ef9645f703c33fe8e438 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0090c13cbbdffd7da079ac56f80373a9a1be0bf8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1bbf82d9f961414d6c76a08f7f843ea068e0ab7b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 92ee3c60ec9fe64404dc035e7c41277d74aa26cb | 2.6.12
  • 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
Debian1 product
  • linux< 5.17.3-1

3 vendors · 109 products

References

12 links
Show all 12 references