Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 93a025166495c63ba5b8ac721c7040d5312e8335; affected 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 8e2007b263ea250251ec3021a0a197da990ee1a8; affected 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 709f6a5e986535005110c6c69b322f63631cb200; affected 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before c32490c6d3f3a9f2d177d57c7eb8bbc347561d08; affected 78ce9fc269af6e69c1399ab910ba6bc81c934f67 before 0594e3423f4ba3137c734371169491f9a98e9af4 |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/93a025166495c63ba5b8ac721c7040d5312e8335
- https://git.kernel.org/stable/c/8e2007b263ea250251ec3021a0a197da990ee1a8
- https://git.kernel.org/stable/c/709f6a5e986535005110c6c69b322f63631cb200
- https://git.kernel.org/stable/c/c32490c6d3f3a9f2d177d57c7eb8bbc347561d08
- https://git.kernel.org/stable/c/0594e3423f4ba3137c734371169491f9a98e9af4