Linux
CVE-2026-99256: In the Linux kernel, the following vulnerability has been resolved: dm cache: fix issue with background work locking dm cache used a rw_semaphore for backgrou
CVE-2026-99256 Nov 3, 2026 Source: Vendor
In the Linux kernel, the following vulnerability has been resolved:
dm cache: fix issue with background work locking
dm cache used a rw_semaphore for background_work_lock. Write locks on
rw_semaphores have strict owner semantics, but there was no guarantee
that the process that locked background_work_lock was the same process
that unlocked it. This can be easily seen using a kernel compiled with
CONFIG_DEBUG_RWSEMS. Given a dm cache device <cache>, run: 'dmsetup
suspend <cache> && dmsetup resu
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-99256
Are you credited here? Sign in to claim your line. It is yours immediately, with no review queue. The name the vendor printed stays next to your handle for anyone to check against the advisory above, and any member who thinks a claim is wrong can refute it.
Credited
0 lines
No credit lines recorded on this release yet.