Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: keys: fix out-of-bounds read in keyring_get_key_chunk() For description-level chunks keyring_get_key_chunk() advances the read pointer by level * sizeof(long) past the inline prefix but only bounds-checks the prefix, so a long enough key description is read past its kmemdup(desc, desc_len + 1) allocation. Compute the full byte offset and bounds-check the description against it before reading. The walk only reaches a description-level chunk when two keys collide through the hash, x, type and domain_tag chunks, so this is reached from an unprivileged add_key(2) with a crafted pair of same-type keys whose index hashes collide; KASAN reports a slab-out-of-bounds read.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f771fde82051976a6fc0fd570f8b86de4a92124b before 4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b; affected f771fde82051976a6fc0fd570f8b86de4a92124b before 79916f40d4ab1b4ae694d8c024fd179454bfe46e; affected f771fde82051976a6fc0fd570f8b86de4a92124b before e5b01998cef8d7f613200230ccaadebe5de9135c; affected f771fde82051976a6fc0fd570f8b86de4a92124b before d1933e03e8c74a018550c31a393b79c4d95bff40; affected f771fde82051976a6fc0fd570f8b86de4a92124b before 3a744838453fb9309ce5a5526d3252e211d60152; affected f771fde82051976a6fc0fd570f8b86de4a92124b before e9417d21a22ad2ec398e78fcf084b717ce92cf2f; affected f771fde82051976a6fc0fd570f8b86de4a92124b before 8dba33c1e779d0fb9a2acb31e354cf0fc0229111; affected f771fde82051976a6fc0fd570f8b86de4a92124b before 63918731f9ae25b5deb022f118e941e6dddfcef4 |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b
- https://git.kernel.org/stable/c/79916f40d4ab1b4ae694d8c024fd179454bfe46e
- https://git.kernel.org/stable/c/e5b01998cef8d7f613200230ccaadebe5de9135c
- https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40
- https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152
- https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f
- https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111
- https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4
ADP enrichment
No English description supplied.
No references supplied.