CVE-2025-21726 In the Linux kernel, the following vulnerability has been resolved: padata: avoid UAF for reorder_work Although the…
Description
In the Linux kernel, the following vulnerability has been resolved: padata: avoid UAF for reorder_work Although the previous patch can avoid ps and ps UAF for _do_serial, it can not avoid potential UAF issue for reorder_work. This issue can happen just as below: crypto_request crypto_request crypto_del_alg padata_do_serial ... padata_reorder // processes all remaining // requests then breaks while (1) { if (!padata) break; ... } padata_do_serial // new request added list_add // sees the new request queue_work(reorder_work) padata_reorder queue_work_on(squeue->work) ... <kworker context> padata_serial_worker // completes new request, // no more outstanding // requests crypto_del_alg // free pd <kworker context> invoke_padata_reorder // UAF of pd To avoid UAF for 'reorder_work', get 'pd' ref before put 'reorder_work' into the 'serial_wq' and put 'pd' ref until the 'serial_wq' finish.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux 6.14 | premières → < 6.14 | 6.14 |
| Linux 6.13 | premières → < 6.13.2 | 6.13.2 |
| Linux 6.12 | premières → < 6.12.13 | 6.12.13 |
| Linux 6.6 | premières → < 6.6.76 | 6.6.76 |
| Linux 6.1 | premières → < 6.1.129 | 6.1.129 |
| Linux 5.15 | premières → < 5.15.179 | 5.15.179 |
| Linux 5.10 | premières → < 5.10.235 | 5.10.235 |
| Linux | 5.6 | Pas de correctif indiqué |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions non publiées |