CVE-2024-26601
Published: February 25, 2024Last modified: February 25, 2024
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd ("ext4: remove redundant mb_regenerate_buddy()") and reintroduces mb_regenerate_buddy(). Based on code in mb_free_blocks(), fast commit replay can end up marking as free blocks that are already marked as such. This causes corruption of the buddy bitmap so we need to regenerate it in that case.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.81-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581
- https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4
- https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a
- https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326
- https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e
- https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html