{"id":"CVE-2022-49506","state":"PUBLISHED","title":"drm/mediatek: Add vblank register/unregister callback functions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add vblank register/unregister callback functions\n\nWe encountered a kernel panic issue that callback data will be NULL when\nit's using in ovl irq handler. There is a timing issue between\nmtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().\n\nTo resolve this issue, we use the flow to register/unregister vblank cb:\n- Register callback function and callback data when crtc creates.\n- Unregister callback function and callback data when crtc destroies.\n\nWith this solution, we can assure callback data will not be NULL when\nvblank is disable.","publishedAt":"2025-02-26T02:13:38.168Z","updatedAt":"2026-05-11T19:01:13.972Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"8a2dbdeccef6de47565638abdf3c25f41cdffc37","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"8a265d9838bc3c63579002d55c2b2c655c4f8f26","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"3a4027b5971fe2a94e32754f007d9d3c12c68ad1","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"b74d921b900b6ce38c6247c0a1c86be9f3746493","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_disp_drv.h","drivers/gpu/drm/mediatek/mtk_disp_ovl.c","drivers/gpu/drm/mediatek/mtk_disp_rdma.c","drivers/gpu/drm/mediatek/mtk_drm_crtc.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.54","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_disp_drv.h","drivers/gpu/drm/mediatek/mtk_disp_ovl.c","drivers/gpu/drm/mediatek/mtk_disp_rdma.c","drivers/gpu/drm/mediatek/mtk_drm_crtc.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"]}],"references":["https://git.kernel.org/stable/c/8a2dbdeccef6de47565638abdf3c25f41cdffc37","https://git.kernel.org/stable/c/8a265d9838bc3c63579002d55c2b2c655c4f8f26","https://git.kernel.org/stable/c/3a4027b5971fe2a94e32754f007d9d3c12c68ad1","https://git.kernel.org/stable/c/b74d921b900b6ce38c6247c0a1c86be9f3746493"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49506.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49506","state":"PUBLISHED","datePublished":"2025-02-26T02:13:38.168Z","dateUpdated":"2026-05-11T19:01:13.972Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.586Z"},"containers":{"cna":{"title":"drm/mediatek: Add vblank register/unregister callback functions","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add vblank register/unregister callback functions\n\nWe encountered a kernel panic issue that callback data will be NULL when\nit's using in ovl irq handler. There is a timing issue between\nmtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().\n\nTo resolve this issue, we use the flow to register/unregister vblank cb:\n- Register callback function and callback data when crtc creates.\n- Unregister callback function and callback data when crtc destroies.\n\nWith this solution, we can assure callback data will not be NULL when\nvblank is disable."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"8a2dbdeccef6de47565638abdf3c25f41cdffc37","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"8a265d9838bc3c63579002d55c2b2c655c4f8f26","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"3a4027b5971fe2a94e32754f007d9d3c12c68ad1","versionType":"git"},{"version":"9b0704988b151824a51133dc4c921f4273c5d839","status":"affected","lessThan":"b74d921b900b6ce38c6247c0a1c86be9f3746493","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_disp_drv.h","drivers/gpu/drm/mediatek/mtk_disp_ovl.c","drivers/gpu/drm/mediatek/mtk_disp_rdma.c","drivers/gpu/drm/mediatek/mtk_drm_crtc.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.54","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_disp_drv.h","drivers/gpu/drm/mediatek/mtk_disp_ovl.c","drivers/gpu/drm/mediatek/mtk_disp_rdma.c","drivers/gpu/drm/mediatek/mtk_drm_crtc.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c","drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/8a2dbdeccef6de47565638abdf3c25f41cdffc37"},{"url":"https://git.kernel.org/stable/c/8a265d9838bc3c63579002d55c2b2c655c4f8f26"},{"url":"https://git.kernel.org/stable/c/3a4027b5971fe2a94e32754f007d9d3c12c68ad1"},{"url":"https://git.kernel.org/stable/c/b74d921b900b6ce38c6247c0a1c86be9f3746493"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:01:13.972Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}