{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64050","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.029Z","datePublished":"2026-07-19T15:39:33.942Z","dateUpdated":"2026-08-05T12:38:41.459Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:38:41.459Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/dpu: don't mix devm and drmm functions\n\nMixing devm and drmm functions will result in a use-after-free on msm\ndriver teardown if userspace keeps a reference on the drm device:\nThe WB connector data will be destroyed because of the use of\ndevm_kzalloc()), while the usersoace still can try interacting with the\nWB connector (which uses drmm_ functions).\n\nChange dpu_writeback_init() to use drmm_.\n\nPatchwork: https://patchwork.freedesktop.org/patch/722656/"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reachable only through local DRM character device ioctls on /dev/dri/card0 during driver teardown, not via any network protocol or physical bus.\nAC:L - An attacker who keeps a DRM file descriptor open controls the userspace side of the race and can repeatedly issue ioctls during the teardown window; UAF exploitation does not depend on winning a race the attacker cannot influence.\nPR:L - Exploitation requires only local access to the primary DRM device node (typically membership in the video/render group on Linux); no real root or init-namespace capabilities are needed to hold the fd and trigger UAF via connector query ioctls.\nUI:N - No victim interaction is required beyond the attacker maintaining their own open DRM file descriptor during driver unload or unbind.\nS:U - The vulnerability causes kernel memory corruption and potential local privilege escalation within the same kernel security boundary, not a cross-boundary escape such as VM or IOMMU bypass.\nC:H - Use-after-free of the dpu_wb_connector structure allows reading freed slab memory and can be leveraged for arbitrary kernel memory disclosure through heap grooming.\nI:H - UAF corruption of connector private data and the wb_enc pointer can be turned into arbitrary kernel writes or code execution, and the writeback path can program display hardware DMA to attacker-influenced addresses.\nA:H - Dereferencing the freed dpu_wb_connector during ioctl handling can cause kernel oops or panic, and UAF exploitation attempts reliably threaten system availability."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c"],"versions":[{"version":"0b37ac63fc9db7779168ad18d7e6e8ab9df6a40b","lessThan":"ff58e5ef1b46ce614af048d2d04986df05ffab90","status":"affected","versionType":"git"},{"version":"0b37ac63fc9db7779168ad18d7e6e8ab9df6a40b","lessThan":"95048a12f48c627bc2ccc4d84f87640630ba2bdb","status":"affected","versionType":"git"},{"version":"0b37ac63fc9db7779168ad18d7e6e8ab9df6a40b","lessThan":"c0c70a11365cba7fba25a77463582bcec0f7846e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c"],"versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ff58e5ef1b46ce614af048d2d04986df05ffab90"},{"url":"https://git.kernel.org/stable/c/95048a12f48c627bc2ccc4d84f87640630ba2bdb"},{"url":"https://git.kernel.org/stable/c/c0c70a11365cba7fba25a77463582bcec0f7846e"}],"title":"drm/msm/dpu: don't mix devm and drmm functions","x_generator":{"engine":"bippy-1.2.0"}}}}