{"id":"CVE-2026-43293","state":"PUBLISHED","title":"media: chips-media: wave5: Fix kthread worker destruction in polling mode","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Fix kthread worker destruction in polling mode\n\nFix the cleanup order in polling mode (irq < 0) to prevent kernel warnings\nduring module removal. Cancel the hrtimer before destroying the kthread\nworker to ensure work queues are empty.\n\nIn polling mode, the driver uses hrtimer to periodically trigger\nwave5_vpu_timer_callback() which queues work via kthread_queue_work().\nThe kthread_destroy_worker() function validates that both work queues\nare empty with WARN_ON(!list_empty(&worker->work_list)) and\nWARN_ON(!list_empty(&worker->delayed_work_list)).\n\nThe original code called kthread_destroy_worker() before hrtimer_cancel(),\ncreating a race condition where the timer could fire during worker\ndestruction and queue new work, triggering the WARN_ON.\n\nThis causes the following warning on every module unload in polling mode:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 1034 at kernel/kthread.c:1430\n    kthread_destroy_worker+0x84/0x98\n  Modules linked in: wave5(-) rpmsg_ctrl rpmsg_char ...\n  Call trace:\n   kthread_destroy_worker+0x84/0x98\n   wave5_vpu_remove+0xc8/0xe0 [wave5]\n   platform_remove+0x30/0x58\n  ...\n  ---[ end trace 0000000000000000 ]---","publishedAt":"2026-05-08T13:11:16.812Z","updatedAt":"2026-05-11T22:21:45.305Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"156020e889edf4593870d926d3c4a6d06baac44a","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"cc8071b1bac6568ea09d54be2d4f74dba80e17f8","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"0c2e752688a0ee3b89993e6de6c496d863870c93","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"5a0c122e834b2f7f029526422c71be922960bf03","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/chips-media/wave5/wave5-vpu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/chips-media/wave5/wave5-vpu.c"]}],"references":["https://git.kernel.org/stable/c/156020e889edf4593870d926d3c4a6d06baac44a","https://git.kernel.org/stable/c/cc8071b1bac6568ea09d54be2d4f74dba80e17f8","https://git.kernel.org/stable/c/0c2e752688a0ee3b89993e6de6c496d863870c93","https://git.kernel.org/stable/c/5a0c122e834b2f7f029526422c71be922960bf03"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43293.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43293","state":"PUBLISHED","datePublished":"2026-05-08T13:11:16.812Z","dateUpdated":"2026-05-11T22:21:45.305Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.999Z"},"containers":{"cna":{"title":"media: chips-media: wave5: Fix kthread worker destruction in polling mode","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Fix kthread worker destruction in polling mode\n\nFix the cleanup order in polling mode (irq < 0) to prevent kernel warnings\nduring module removal. Cancel the hrtimer before destroying the kthread\nworker to ensure work queues are empty.\n\nIn polling mode, the driver uses hrtimer to periodically trigger\nwave5_vpu_timer_callback() which queues work via kthread_queue_work().\nThe kthread_destroy_worker() function validates that both work queues\nare empty with WARN_ON(!list_empty(&worker->work_list)) and\nWARN_ON(!list_empty(&worker->delayed_work_list)).\n\nThe original code called kthread_destroy_worker() before hrtimer_cancel(),\ncreating a race condition where the timer could fire during worker\ndestruction and queue new work, triggering the WARN_ON.\n\nThis causes the following warning on every module unload in polling mode:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 1034 at kernel/kthread.c:1430\n    kthread_destroy_worker+0x84/0x98\n  Modules linked in: wave5(-) rpmsg_ctrl rpmsg_char ...\n  Call trace:\n   kthread_destroy_worker+0x84/0x98\n   wave5_vpu_remove+0xc8/0xe0 [wave5]\n   platform_remove+0x30/0x58\n  ...\n  ---[ end trace 0000000000000000 ]---"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"156020e889edf4593870d926d3c4a6d06baac44a","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"cc8071b1bac6568ea09d54be2d4f74dba80e17f8","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"0c2e752688a0ee3b89993e6de6c496d863870c93","versionType":"git"},{"version":"ed7276ed2fd02208bfca9f222ef1e7b2743d710d","status":"affected","lessThan":"5a0c122e834b2f7f029526422c71be922960bf03","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/chips-media/wave5/wave5-vpu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/chips-media/wave5/wave5-vpu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/156020e889edf4593870d926d3c4a6d06baac44a"},{"url":"https://git.kernel.org/stable/c/cc8071b1bac6568ea09d54be2d4f74dba80e17f8"},{"url":"https://git.kernel.org/stable/c/0c2e752688a0ee3b89993e6de6c496d863870c93"},{"url":"https://git.kernel.org/stable/c/5a0c122e834b2f7f029526422c71be922960bf03"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:21:45.305Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}