CVE - CVE-2025-21726

CVE-ID
CVE-2025-21726	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/6f45ef616775b0ce7889b0f6077fc8d681ab30bc URL:https://git.kernel.org/stable/c/6f45ef616775b0ce7889b0f6077fc8d681ab30bc MISC:https://git.kernel.org/stable/c/7000507bb0d2ceb545c0a690e0c707c897d102c2 URL:https://git.kernel.org/stable/c/7000507bb0d2ceb545c0a690e0c707c897d102c2 MISC:https://git.kernel.org/stable/c/8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac URL:https://git.kernel.org/stable/c/8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac MISC:https://git.kernel.org/stable/c/a54091c24220a4cd847d5b4f36d678edacddbaf0 URL:https://git.kernel.org/stable/c/a54091c24220a4cd847d5b4f36d678edacddbaf0 MISC:https://git.kernel.org/stable/c/dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 URL:https://git.kernel.org/stable/c/dd7d37ccf6b11f3d95e797ebe4e9e886d0332600
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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