{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50393", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:06.998Z", "datePublished": "2025-09-18T13:33:12.247Z", "dateUpdated": "2026-08-15T12:23:26.499Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:23:26.499Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: SDMA update use unlocked iterator\n\nSDMA update page table may be called from unlocked context, this\ngenerate below warning. Use unlocked iterator to handle this case.\n\nWARNING: CPU: 0 PID: 1475 at\ndrivers/dma-buf/dma-resv.c:483 dma_resv_iter_next\nCall Trace:\n dma_resv_iter_first+0x43/0xa0\n amdgpu_vm_sdma_update+0x69/0x2d0 [amdgpu]\n amdgpu_vm_ptes_update+0x29c/0x870 [amdgpu]\n amdgpu_vm_update_range+0x2f6/0x6c0 [amdgpu]\n svm_range_unmap_from_gpus+0x115/0x300 [amdgpu]\n svm_range_cpu_invalidate_pagetables+0x510/0x5e0 [amdgpu]\n __mmu_notifier_invalidate_range_start+0x1d3/0x230\n unmap_vmas+0x140/0x150\n unmap_region+0xa8/0x110" } ], "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 - Reachable only via local KFD SVM: open /dev/kfd, set up an SVM range, then munmap triggers svm_range_cpu_invalidate_pagetables → svm_range_unmap_from_gpus → amdgpu_vm_update_range(unlocked=true) → amdgpu_vm_sdma_update; no network or adjacent-link path.\nAC:L - The attacker controls both sides—munmap to hit the unlocked MMU-notifier path while concurrently driving GPU/SVM updates that lock and rewrite the same PD/PT dma_resv fence list—so the race does not depend on conditions outside their influence.\nPR:L - /dev/kfd and DRM render nodes are group-accessible to unprivileged users in the render/video group (typically 0660 root:render) with no capability gate, so init-ns root is not required.\nUI:N - The attacker opens KFD, configures SVM mappings, and unmaps/races GPU updates entirely themselves; no separate victim action is required.\nS:U - Impact stays within the local host kernel privilege boundary as a standard kernel memory-safety/privilege-escalation issue, not a VM, IOMMU, or sandbox escape.\nC:H - The locked iterator walks dma_resv fences without rcu_read_lock or dma_fence_get_rcu while writers may kfree_rcu the list and drop fence refs, yielding a UAF of dma_resv_list/dma_fence usable for arbitrary kernel reads.\nI:H - The same unlocked locked-iteration UAF lets the attacker reclaim freed fence/list objects and build write or control-flow hijacking primitives beyond a pure crash.\nA:H - The path reliably hits dma_resv_assert_held WARN/oops under lockdep, and the concurrent UAF can crash the kernel even without full exploitation, so availability impact is high." } ] } ], "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/amdgpu/amdgpu_vm_sdma.c" ], "versions": [ { "version": "8bb31587820a6e04cb613b49238b1800d1a97223", "lessThan": "b892c57a3a04c8de247ab9ee08a0a8cf53290e19", "status": "affected", "versionType": "git" }, { "version": "8bb31587820a6e04cb613b49238b1800d1a97223", "lessThan": "4ff3d517cebe8a29b9f3c302b5292bb1ce291e00", "status": "affected", "versionType": "git" }, { "version": "8bb31587820a6e04cb613b49238b1800d1a97223", "lessThan": "3913f0179ba366f7d7d160c506ce00de1602bbc4", "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/amdgpu/amdgpu_vm_sdma.c" ], "versions": [ { "version": "5.19", "status": "affected" }, { "version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "5.19", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b892c57a3a04c8de247ab9ee08a0a8cf53290e19" }, { "url": "https://git.kernel.org/stable/c/4ff3d517cebe8a29b9f3c302b5292bb1ce291e00" }, { "url": "https://git.kernel.org/stable/c/3913f0179ba366f7d7d160c506ce00de1602bbc4" } ], "title": "drm/amdgpu: SDMA update use unlocked iterator", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-50393", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:51:05.793062Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:53:05.725Z" } } ] } }