CVE-2023-53816

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As soon as the mutex\nis unlocked, another thread can free the BO."}], "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 vulnerability is reached through ioctls (AMDKFD_IOC_MAP_MEMORY_TO_GPU / UNMAP_MEMORY_FROM_GPU raced against FREE_MEMORY_OF_GPU) on the /dev/kfd character device, requiring local access to the system. There is no network or remote-peer input path into kfd_chardev.c.\nAC:L - The attacker controls both sides of the race entirely \u2014 two threads of their own process issuing concurrent ioctls \u2014 and can set the user-supplied args->n_success equal to n_devices to skip the mapping loop so the concurrent free is not rejected with -EBUSY. The window is further made near-deterministic because the victim thread blocks on mutex_lock(&mem->lock) which the freeing thread holds, so it is woken onto memory that has already been mutex_destroy()'d and kfree()'d.\nPR:L - The map/unmap/free memory ioctls are defined with flags 0 \u2014 no capability check whatsoever; the only requirement is an open fd on /dev/kfd, which distro/ROCm udev rules grant to ordinary local users (mode 0666, render/video group, or uaccess for the seat user) on any AMD GPU workstation or GPU-compute node. No root, CAP_SYS_ADMIN, or CAP_CHECKPOINT_RESTORE is needed.\nUI:N - The attacker's own process performs all steps (allocate BO, then race map/unmap against free) with no action by any other user. No victim interaction is involved.\nS:U - The use-after-free corrupts kernel heap memory and is exploited within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. Standard local kernel privilege escalation stays Unchanged.\nC:H - The freed kgd_mem lives in a generic kmalloc cache and can be resprayed with attacker-controlled data, after which amdgpu_sync_clone() walks mem->sync.fences and dereferences attacker-supplied pointers, giving an arbitrary kernel-memory read primitive and, via full control-flow hijack, disclosure of all kernel memory.\nI:H - The UAF yields writes into the freed slab (mutex_lock owner field, dma_fence_get refcount increments at attacker-chosen addresses) and an indirect call through a forged dma_fence_ops->signaled/->wait pointer, which is a control-flow hijack primitive enabling arbitrary kernel code execution and privilege escalation.\nA:H - Even without successful exploitation, operating on a kfree()'d object with a mutex_destroy()'d lock and walking its stale fence hashtable reliably produces kernel oopses/panics, and the attacker can trigger it repeatedly at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "versions": [{"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "5045360f3bb62ccd4f87202e33489f71f8bbc3fc", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "5ca14fb5552ac13a2402d306c0bd2379a71610ff", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "9da050b0d9e04439d225a2ec3044af70cdfb3933", "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/amd/amdkfd/kfd_chardev.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.23", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.10", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "3.19", "versionEndExcluding": "6.1.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5045360f3bb62ccd4f87202e33489f71f8bbc3fc"}, {"url": "https://git.kernel.org/stable/c/5ca14fb5552ac13a2402d306c0bd2379a71610ff"}, {"url": "https://git.kernel.org/stable/c/9da050b0d9e04439d225a2ec3044af70cdfb3933"}], "title": "drm/amdkfd: fix potential kgd_mem UAFs", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53816", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:37:25.241793Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:36.576Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53816", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:37:25.241793Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:37:25.985Z"}}], "cna": {"title": "drm/amdkfd: fix potential kgd_mem UAFs", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached through ioctls (AMDKFD_IOC_MAP_MEMORY_TO_GPU / UNMAP_MEMORY_FROM_GPU raced against FREE_MEMORY_OF_GPU) on the /dev/kfd character device, requiring local access to the system. There is no network or remote-peer input path into kfd_chardev.c.\nAC:L - The attacker controls both sides of the race entirely \u2014 two threads of their own process issuing concurrent ioctls \u2014 and can set the user-supplied args->n_success equal to n_devices to skip the mapping loop so the concurrent free is not rejected with -EBUSY. The window is further made near-deterministic because the victim thread blocks on mutex_lock(&mem->lock) which the freeing thread holds, so it is woken onto memory that has already been mutex_destroy()'d and kfree()'d.\nPR:L - The map/unmap/free memory ioctls are defined with flags 0 \u2014 no capability check whatsoever; the only requirement is an open fd on /dev/kfd, which distro/ROCm udev rules grant to ordinary local users (mode 0666, render/video group, or uaccess for the seat user) on any AMD GPU workstation or GPU-compute node. No root, CAP_SYS_ADMIN, or CAP_CHECKPOINT_RESTORE is needed.\nUI:N - The attacker's own process performs all steps (allocate BO, then race map/unmap against free) with no action by any other user. No victim interaction is involved.\nS:U - The use-after-free corrupts kernel heap memory and is exploited within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. Standard local kernel privilege escalation stays Unchanged.\nC:H - The freed kgd_mem lives in a generic kmalloc cache and can be resprayed with attacker-controlled data, after which amdgpu_sync_clone() walks mem->sync.fences and dereferences attacker-supplied pointers, giving an arbitrary kernel-memory read primitive and, via full control-flow hijack, disclosure of all kernel memory.\nI:H - The UAF yields writes into the freed slab (mutex_lock owner field, dma_fence_get refcount increments at attacker-chosen addresses) and an indirect call through a forged dma_fence_ops->signaled/->wait pointer, which is a control-flow hijack primitive enabling arbitrary kernel code execution and privilege escalation.\nA:H - Even without successful exploitation, operating on a kfree()'d object with a mutex_destroy()'d lock and walking its stale fence hashtable reliably produces kernel oopses/panics, and the attacker can trigger it repeatedly at will."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "5045360f3bb62ccd4f87202e33489f71f8bbc3fc", "versionType": "git"}, {"status": "affected", "version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "5ca14fb5552ac13a2402d306c0bd2379a71610ff", "versionType": "git"}, {"status": "affected", "version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "9da050b0d9e04439d225a2ec3044af70cdfb3933", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.19"}, {"status": "unaffected", "version": "0", "lessThan": "3.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.23", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2.10", "versionType": "semver", "lessThanOrEqual": "6.2.*"}, {"status": "unaffected", "version": "6.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5045360f3bb62ccd4f87202e33489f71f8bbc3fc"}, {"url": "https://git.kernel.org/stable/c/5ca14fb5552ac13a2402d306c0bd2379a71610ff"}, {"url": "https://git.kernel.org/stable/c/9da050b0d9e04439d225a2ec3044af70cdfb3933"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix potential kgd_mem UAFs\n\nkgd_mem pointers returned by kfd_process_device_translate_handle are\nonly guaranteed to be valid while p->mutex is held. As soon as the mutex\nis unlocked, another thread can free the BO."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.23", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2.10", "versionStartIncluding": "3.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.3", "versionStartIncluding": "3.19"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:16:10.458Z"}}}, "cveMetadata": {"cveId": "CVE-2023-53816", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:41:36.576Z", "dateReserved": "2025-12-08T23:58:35.277Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-09T00:01:14.166Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: drm/amdkfd: fix potential kgd_mem UAFs", "id": "2420281", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420281"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdkfd: fix potential kgd_mem UAFs\nkgd_mem pointers returned by kfd_process_device_translate_handle are\nonly guaranteed to be valid while p->mutex is held. As soon as the mutex\nis unlocked, another thread can free the BO."], "name": "CVE-2023-53816", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53816\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53816\nhttps://lore.kernel.org/linux-cve-announce/2025120945-CVE-2023-53816-e869@gregkh/T"], "threat_severity": "Moderate"}

{}