Tracker / CVE-2022-49291
CVE-2022-49291
High 7.8
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.
Affected products and versions
| linux | linux_kernel · … → 4.14.279 |
|---|---|
| linux | linux_kernel · 4.15 → 4.19.243 |
| linux | linux_kernel · 4.20 → 5.4.193 |
| linux | linux_kernel · 5.11 → 5.15.32 |
| linux | linux_kernel · 5.16 → 5.16.18 |
| linux | linux_kernel · 5.17 → 5.17.1 |
| linux | linux_kernel · 5.5 → 5.10.109 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.