Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9578e327b2b4935a25d49e3891b8fcca9b6c10c6 before 6afe2ea2daec156bd94ad2c5a6f4f4c48240dcd3; affected 9578e327b2b4935a25d49e3891b8fcca9b6c10c6 before f6a3cf833188e897c97028cd7b926e3f2cb1a8c0; affected 9578e327b2b4935a25d49e3891b8fcca9b6c10c6 before 75845c6c1a64483e9985302793dbf0dfa5f71e32 |
| Linux / Linux | affected 6.10; unaffected 0 before 6.10; unaffected 6.12.21 through 6.12.*; unaffected 6.13.9 through 6.13.*; unaffected 6.14 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6afe2ea2daec156bd94ad2c5a6f4f4c48240dcd3
- https://git.kernel.org/stable/c/f6a3cf833188e897c97028cd7b926e3f2cb1a8c0
- https://git.kernel.org/stable/c/75845c6c1a64483e9985302793dbf0dfa5f71e32
ADP enrichment
No English description supplied.
No references supplied.