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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 to < 4051324a6dafd7053c74c475e80b3ba10ae672b0affectede3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 to < fce793a056c604b41a298317cf704dae255f1b36affectede3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 to < 8015ef9e8a0ee5cecfd0cb6805834d007ab26f86affectede3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 to < 723ac5ab2891b6c10dd6cc78ef5456af593490ebaffectede3a5d59a17e9a42e3f3e0e37342b2679bab2ff43 to < 8423f0b6d513b259fdab9c9bf4aaa6188d054c2daffected
Linux Linux
Default version status: affected
2.6.20affected0 to < 2.6.20unaffected5.4.215 to ≤ 5.4.*unaffected5.10.148 to ≤ 5.10.*unaffected5.15.68 to ≤ 5.15.*unaffected5.19.9 to ≤ 5.19.*unaffected6.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/4051324a6dafd7053c74c475e80b3ba10ae672b0 ↗
- https://git.kernel.org/stable/c/fce793a056c604b41a298317cf704dae255f1b36 ↗
- https://git.kernel.org/stable/c/8015ef9e8a0ee5cecfd0cb6805834d007ab26f86 ↗
- https://git.kernel.org/stable/c/723ac5ab2891b6c10dd6cc78ef5456af593490eb ↗
- https://git.kernel.org/stable/c/8423f0b6d513b259fdab9c9bf4aaa6188d054c2d ↗