CVE-2026-98245
Published: October 9, 2026Last modified: November 3, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: take commit root semaphore when iterating in mark_block_group_to_copy() mark_block_group_to_copy() iterates over the commit root with skip_locking=true. A concurrent transaction commit can swap and free the commit root during iteration, causing use-after-free when accessing extent buffers. Fix it by using path->need_commit_sem to protect the commit root search.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.191-r0) |
| 25 LTS | linux-lts | Fixed (6.12.112-r0) | |
| Stream | linux-lts | Fixed (6.18.55-r0) |
References
- https://git.kernel.org/stable/c/0594e3423f4ba3137c734371169491f9a98e9af4
- https://git.kernel.org/stable/c/709f6a5e986535005110c6c69b322f63631cb200
- https://git.kernel.org/stable/c/8e2007b263ea250251ec3021a0a197da990ee1a8
- https://git.kernel.org/stable/c/90242b776df83f8b1ea901f80b568b4fc2318c61
- https://git.kernel.org/stable/c/93a025166495c63ba5b8ac721c7040d5312e8335
- https://git.kernel.org/stable/c/bffe773f92885603db14047bba0f12089105929e
- https://git.kernel.org/stable/c/c32490c6d3f3a9f2d177d57c7eb8bbc347561d08