{"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"}}}}

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{"bugzilla": {"description": "kernel: drm/msm/dpu: don't mix devm and drmm functions", "id": "2502542", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502542"}, "csaw": false, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/msm/dpu: don't mix devm and drmm functions\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).\nChange dpu_writeback_init() to use drmm_.\nPatchwork: https://patchwork.freedesktop.org/patch/722656/", "A flaw was found in the Linux kernel's drm/msm/dpu component. This vulnerability occurs due to the incorrect use of different memory management functions, which can lead to data being prematurely released while still in use. A local user could exploit this during driver teardown, resulting in a use-after-free condition. This could lead to system instability or a denial of service."], "name": "CVE-2026-64050", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64050\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64050\nhttps://lore.kernel.org/linux-cve-announce/2026071908-CVE-2026-64050-625f@gregkh/T"]}

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