Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: always drain cache_cleaner before destroying a cache_detail sunrpc_destroy_cache_detail() only cancels the global cache_cleaner delayed_work when cache_list is empty. During per-netns teardown cache_list is never empty because init_net's caches remain registered, so the cancel never fires. After unlink, the caller proceeds to cache_destroy_net() which kfrees the cache_detail while cache_clean() may still hold a dangling pointer to it. The result is a use-after-free: cache_dequeue() takes cd->queue_lock on freed memory, and cache_put() dereferences cd->cache_put as a function pointer from freed slab. Drop the list_empty guard so that cancel_delayed_work_sync() always runs, ensuring any in-flight cache_clean() completes before the cache_detail is freed. Re-arm the cleaner afterwards if other caches are still registered.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before dec787a15c96a5665e9ffc61b429a6a4ab26e6b9; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before 5eea874a696201c31e7c2d7badbfa0d90e9961b5; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before cf239de7fdcc8336259b01ea4bcf650dadad1040; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before 6d74ecc2be120a0c300b224b7649fe93c0453714; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before 9d44836f60c8c29bcdb1471fd9202387c642a890; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before 2e861ce2aaa468351a6a47c4cbb4971ebb740c7b; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before 3d60fdf951143d6ef4e352e2f8eb852286701726; affected 820f9442e711a81749e70c40f149fc54c4ce0ca8 before f42d0fda0c67695db6bc704b04b7c10240805377 |
| Linux / Linux | affected 3.4; unaffected 0 before 3.4; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9
- https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5
- https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040
- https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714
- https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890
- https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b
- https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726
- https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377
ADP enrichment
No English description supplied.
No references supplied.