CVE-2022-49733
02.03.2025, 15:15
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.
Vendor | Product | Version |
---|---|---|
linux | linux_kernel | 𝑥 < 5.4.215 |
linux | linux_kernel | 5.5 ≤ 𝑥 < 5.10.148 |
linux | linux_kernel | 5.11 ≤ 𝑥 < 5.15.68 |
linux | linux_kernel | 5.16 ≤ 𝑥 < 5.19.9 |
linux | linux_kernel | 6.0:rc1 |
linux | linux_kernel | 6.0:rc2 |
linux | linux_kernel | 6.0:rc3 |
linux | linux_kernel | 6.0:rc4 |
𝑥
= Vulnerable software versions

Debian Releases
Common Weakness Enumeration
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
- CWE-476 - NULL Pointer DereferenceA NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
References