CVE-2022-49291
ALSA: pcm: Fix races among concurrent hw_params and hw_free calls
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 77% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < a42aa926843acca96c0dfbde2e835b8137f2f092
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < fbeb492694ce0441053de57699e1e2b7bc148a69
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 33061d0fba51d2bf70a2ef9645f703c33fe8e438
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0090c13cbbdffd7da079ac56f80373a9a1be0bf8
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 1bbf82d9f961414d6c76a08f7f843ea068e0ab7b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 92ee3c60ec9fe64404dc035e7c41277d74aa26cb
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.14.279 – ≤ 4.14.*
- unaffected 4.19.243 – ≤ 4.19.*
- unaffected 5.4.193 – ≤ 5.4.*
- unaffected 5.10.109 – ≤ 5.10.*
- unaffected 5.15.32 – ≤ 5.15.*
- unaffected 5.16.18 – ≤ 5.16.*
- unaffected 5.17.1 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (8)
- https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092 (opens in a new tab)
- https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9 (opens in a new tab)
- https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69 (opens in a new tab)
- https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8 (opens in a new tab)
- https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438 (opens in a new tab)
- https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8 (opens in a new tab)
- https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b (opens in a new tab)
- https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49291)Record last updated .