Description (CNA)
When an audio channel's buffer needs to be resized, the sound(4) driver checks that the buffer is not memory-mapped and then drops the channel lock to allocate a new buffer. An mmap(2) call on another thread can complete during this window, after which the resize path frees the now-mapped buffer without rechecking. An unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| FreeBSD / FreeBSD | affected 15.1-RELEASE before p5; affected 14.5-RELEASE before p2; affected 14.4-RELEASE before p11 |
CWE
CWE-367
References
ADP enrichment
No English description supplied.
No references supplied.