CVE-2022-49733
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…
Does this matter?
Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.15% probability · 5th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/4051324a6dafd7053c74c475e80b3ba10ae672b0Patch
- https://git.kernel.org/stable/c/723ac5ab2891b6c10dd6cc78ef5456af593490ebPatch
- https://git.kernel.org/stable/c/8015ef9e8a0ee5cecfd0cb6805834d007ab26f86Patch
- https://git.kernel.org/stable/c/8423f0b6d513b259fdab9c9bf4aaa6188d054c2dPatch
- https://git.kernel.org/stable/c/fce793a056c604b41a298317cf704dae255f1b36Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.