padata: avoid UAF for reorder_work

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21726
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-27 02:15:16 UTC
Updated2026-05-12 13:16:33 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb 7000507bb0d2ceb545c0a690e0c707c897d102c2 git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb 6f45ef616775b0ce7889b0f6077fc8d681ab30bc git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb a54091c24220a4cd847d5b4f36d678edacddbaf0 git Not specified
CNA Linux Linux affected bbefa1dd6a6d53537c11624752219e39959d04fb dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 git Not specified
CNA Linux Linux affected b4c8ed0bf977760a206997b6429a7ac91978f440 git Not specified
CNA Linux Linux affected e43d65719527043f1ef79ecba9d4ede58cbc7ffe git Not specified
CNA Linux Linux affected 5.6 Not specified
CNA Linux Linux unaffected 5.6 semver Not specified
CNA Linux Linux unaffected 5.10.235 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.179 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.129 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.76 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.13 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13.2 6.13.* semver Not specified
CNA Linux Linux unaffected 6.14 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/05/msg00030.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a54091c24220a4cd847d5b4f36d678edacddbaf0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/7000507bb0d2ceb545c0a690e0c707c897d102c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6f45ef616775b0ce7889b0f6077fc8d681ab30bc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00028.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
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