Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: padata: Fix pd UAF once and for all There is a race condition/UAF in padata_reorder that goes back to the initial commit. A reference count is taken at the start of the process in padata_do_parallel, and released at the end in padata_serial_worker. This reference count is (and only is) required for padata_replace to function correctly. If padata_replace is never called then there is no issue. In the function padata_reorder which serves as the core of padata, as soon as padata is added to queue->serial.list, and the associated spin lock released, that padata may be processed and the reference count on pd would go away. Fix this by getting the next padata before the squeue->serial lock is released. In order to make this possible, simplify padata_reorder by only calling it once the next padata arrives.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before a2048e475e22b13dc3e53d485b7e6e11464ed9a6; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before 73f132e60857038416540c3599b1de6033d7575a; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before 609e59193fc6d9dd323f1c6ae1fdd721f1c79680; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before a11a12a9880ab37342b73c93cfe1a3ada02ff0db; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before f231d5d001ec75f5886c02d496a4c79edc383d45; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before dbe3e911a59bda6de96e7cae387ff882c2c177fa; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before cdf79bd2e1ecb3cc75631c73d8f4149be6019a52; affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 before 71203f68c7749609d7fc8ae6ad054bdedeb24f91 |
| Linux / Linux | affected 2.6.34; unaffected 0 before 2.6.34; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.86 through 6.12.*; unaffected 6.15.10 through 6.15.*; unaffected 6.16.1 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a2048e475e22b13dc3e53d485b7e6e11464ed9a6
- https://git.kernel.org/stable/c/73f132e60857038416540c3599b1de6033d7575a
- https://git.kernel.org/stable/c/609e59193fc6d9dd323f1c6ae1fdd721f1c79680
- https://git.kernel.org/stable/c/a11a12a9880ab37342b73c93cfe1a3ada02ff0db
- https://git.kernel.org/stable/c/f231d5d001ec75f5886c02d496a4c79edc383d45
- https://git.kernel.org/stable/c/dbe3e911a59bda6de96e7cae387ff882c2c177fa
- https://git.kernel.org/stable/c/cdf79bd2e1ecb3cc75631c73d8f4149be6019a52
- https://git.kernel.org/stable/c/71203f68c7749609d7fc8ae6ad054bdedeb24f91
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.