In the Linux kernel, the following vulnerability has been resolved:
keys: Fix UAF in key_put()
Once a key's reference count has been reduced to 0, the garbage collector
thread may destroy it at any time and so key_put() is not allowed to touch
the key after that point. The most key_put() is normally allowed to do is
to touch key_gc_work as that's a static global variable.
However, in an effort to speed up the reclamation of quota, this is now
done in key_put() once the key's usage is reduced to 0 - but now the code
is looking at the key after the deadline, which is forbidden.
Fix this by using a flag to indicate that a key can be gc'd now rather than
looking at the key's refcount in the garbage collector.
CVSS
No CVSS.
References
Configurations
Configuration 1 (hide)
|
History
08 Apr 2025, 15:48
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/6afe2ea2daec156bd94ad2c5a6f4f4c48240dcd3 - Patch | |
| References | () https://git.kernel.org/stable/c/75845c6c1a64483e9985302793dbf0dfa5f71e32 - Patch | |
| References | () https://git.kernel.org/stable/c/f6a3cf833188e897c97028cd7b926e3f2cb1a8c0 - Patch |
31 Mar 2025, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-03-31 20:15
Updated : 2025-04-08 15:48
NVD link : CVE-2025-21893
Mitre link : CVE-2025-21893
JSON object : View
Products Affected
linux
- linux_kernel
CWE
No CWE.