CVE-2022-49733
ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC There is a small race window at snd_pcm_oss_sync() that is called from OSS PCM SNDCTL_DSP_SYNC ioctl; namely the function calls snd_pcm_oss_make_ready() at first, then takes the params_lock mutex for the rest. When the stream is set up again by another thread between them, it leads to inconsistency, and may result in unexpected results such as NULL dereference of OSS buffer as a fuzzer spotted recently. The fix is simply to cover snd_pcm_oss_make_ready() call into the same params_lock mutex with snd_pcm_oss_make_ready_locked() variant.
Timeline
ID reserved
By Linux
- 4 days later
· 4 days later
Published
- 17 months later
· 17 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 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 – < 4051324a6dafd7053c74c475e80b3ba10ae672b0
- affected e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 – < fce793a056c604b41a298317cf704dae255f1b36
- affected e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 – < 8015ef9e8a0ee5cecfd0cb6805834d007ab26f86
- affected e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 – < 723ac5ab2891b6c10dd6cc78ef5456af593490eb
- affected e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 – < 8423f0b6d513b259fdab9c9bf4aaa6188d054c2d
- affected 2.6.20
- unaffected < 2.6.20
- unaffected 5.4.215 – ≤ 5.4.*
- unaffected 5.10.148 – ≤ 5.10.*
- unaffected 5.15.68 – ≤ 5.15.*
- unaffected 5.19.9 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References (5)
- https://git.kernel.org/stable/c/4051324a6dafd7053c74c475e80b3ba10ae672b0 (opens in a new tab)
- https://git.kernel.org/stable/c/fce793a056c604b41a298317cf704dae255f1b36 (opens in a new tab)
- https://git.kernel.org/stable/c/8015ef9e8a0ee5cecfd0cb6805834d007ab26f86 (opens in a new tab)
- https://git.kernel.org/stable/c/723ac5ab2891b6c10dd6cc78ef5456af593490eb (opens in a new tab)
- https://git.kernel.org/stable/c/8423f0b6d513b259fdab9c9bf4aaa6188d054c2d (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-2022-49733)Record last updated .