CVE-2025-21726 (GCVE-0-2025-21726)
Vulnerability from cvelistv5
Published
2025-02-27 02:07
Modified
2026-05-23 15:57
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: bbefa1dd6a6d53537c11624752219e39959d04fb
Version: b4c8ed0bf977760a206997b6429a7ac91978f440
Version: e43d65719527043f1ef79ecba9d4ede58cbc7ffe
Version: 5.4.19   ≤
Version: 5.5.3   ≤
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