Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ext4: validate p_idx bounds in ext4_ext_correct_indexes ext4_ext_correct_indexes() walks up the extent tree correcting index entries when the first extent in a leaf is modified. Before accessing path[k].p_idx->ei_block, there is no validation that p_idx falls within the valid range of index entries for that level. If the on-disk extent header contains a corrupted or crafted eh_entries value, p_idx can point past the end of the allocated buffer, causing a slab-out-of-bounds read. Fix this by validating path[k].p_idx against EXT_LAST_INDEX() at both access sites: before the while loop and inside it. Return -EFSCORRUPTED if the index pointer is out of range, consistent with how other bounds violations are handled in the ext4 extent tree code.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 39d6e2b67651614bac0dc6592fa9836321910067; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before c5839b34704c9c2f47f079451bdbb22de0da1ed1; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 10242e640b36b91ad03d25f3dc77854bbdff8358; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 4d08401aa13f1531216f1a7ae281ca4806e90a5c; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 407c944f217c17d4343148011acafebc604d55e1; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 93f2e975ed658ce09db4d4c2877ca2c06540df83; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 01bf1e0b997d82c0e353b51ed74ef99698043c33; affected a86c61812637c7dd0c57e29880cffd477b62f2e7 before 2acb5c12ebd860f30e4faf67e6cc8c44ddfe5fe8 |
| Linux / Linux | affected 2.6.19; unaffected 0 before 2.6.19; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.80 through 6.12.*; unaffected 6.18.21 through 6.18.*; unaffected 6.19.11 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/39d6e2b67651614bac0dc6592fa9836321910067
- https://git.kernel.org/stable/c/c5839b34704c9c2f47f079451bdbb22de0da1ed1
- https://git.kernel.org/stable/c/10242e640b36b91ad03d25f3dc77854bbdff8358
- https://git.kernel.org/stable/c/4d08401aa13f1531216f1a7ae281ca4806e90a5c
- https://git.kernel.org/stable/c/407c944f217c17d4343148011acafebc604d55e1
- https://git.kernel.org/stable/c/93f2e975ed658ce09db4d4c2877ca2c06540df83
- https://git.kernel.org/stable/c/01bf1e0b997d82c0e353b51ed74ef99698043c33
- https://git.kernel.org/stable/c/2acb5c12ebd860f30e4faf67e6cc8c44ddfe5fe8
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.