media: chips-media: wave5: Fix kthread worker destruction in polling mode

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Summary

CVECVE-2026-43293
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:36 UTC
Updated2026-05-14 19:50:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Fix kthread worker destruction in polling mode Fix the cleanup order in polling mode (irq < 0) to prevent kernel warnings during module removal. Cancel the hrtimer before destroying the kthread worker to ensure work queues are empty. In polling mode, the driver uses hrtimer to periodically trigger wave5_vpu_timer_callback() which queues work via kthread_queue_work(). The kthread_destroy_worker() function validates that both work queues are empty with WARN_ON(!list_empty(&worker->work_list)) and WARN_ON(!list_empty(&worker->delayed_work_list)). The original code called kthread_destroy_worker() before hrtimer_cancel(), creating a race condition where the timer could fire during worker destruction and queue new work, triggering the WARN_ON. This causes the following warning on every module unload in polling mode: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 1034 at kernel/kthread.c:1430 kthread_destroy_worker+0x84/0x98 Modules linked in: wave5(-) rpmsg_ctrl rpmsg_char ... Call trace: kthread_destroy_worker+0x84/0x98 wave5_vpu_remove+0xc8/0xe0 [wave5] platform_remove+0x30/0x58 ... ---[ end trace 0000000000000000 ]---

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000180000 probability, percentile 0.047270000 (date 2026-05-12)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 ed7276ed2fd02208bfca9f222ef1e7b2743d710d 156020e889edf4593870d926d3c4a6d06baac44a git Not specified
CNA Linux Linux affected ed7276ed2fd02208bfca9f222ef1e7b2743d710d cc8071b1bac6568ea09d54be2d4f74dba80e17f8 git Not specified
CNA Linux Linux affected ed7276ed2fd02208bfca9f222ef1e7b2743d710d 0c2e752688a0ee3b89993e6de6c496d863870c93 git Not specified
CNA Linux Linux affected ed7276ed2fd02208bfca9f222ef1e7b2743d710d 5a0c122e834b2f7f029526422c71be922960bf03 git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cc8071b1bac6568ea09d54be2d4f74dba80e17f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5a0c122e834b2f7f029526422c71be922960bf03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0c2e752688a0ee3b89993e6de6c496d863870c93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/156020e889edf4593870d926d3c4a6d06baac44a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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