Homepage

CVE-2025-21726 The advisory has been revoked - it doesn't affect any version of package libperf  (opens in a new tab)

Threat Intelligence

EPSS
0.03% (9th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ALMALINUX10-LIBPERF-14118822
  • published26 Nov 2025
  • disclosed11 Nov 2025
Report a new vulnerability Found a mistake?

Introduced: 11 Nov 2025

CVE-2025-21726  (opens in a new tab)

Amendment

The AlmaLinux security team deemed this advisory irrelevant for AlmaLinux:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by AlmaLinux.

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