CVE-2022-50393

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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 \u2192 svm_range_unmap_from_gpus \u2192 amdgpu_vm_update_range(unlocked=true) \u2192 amdgpu_vm_sdma_update; no network or adjacent-link path.\nAC:L - The attacker controls both sides\u2014munmap 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\u2014so 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"}}]}}

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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"}], "id": "CVE-2022-50393", "lastModified": "2026-08-15T13:17:34.180", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-50393", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-14T18:51:05.793062Z", "version": "2.0.3"}}]}, "published": "2025-09-18T14:15:38.380", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3913f0179ba366f7d7d160c506ce00de1602bbc4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4ff3d517cebe8a29b9f3c302b5292bb1ce291e00"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b892c57a3a04c8de247ab9ee08a0a8cf53290e19"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amdgpu: SDMA update use unlocked iterator", "id": "2396403", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396403"}, "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": ["No description is available for this CVE."], "name": "CVE-2022-50393", "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": "2025-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50393\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50393\nhttps://lore.kernel.org/linux-cve-announce/2025091853-CVE-2022-50393-d5da@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-19T09:36:42.819305+00:00", "updated": "2025-09-19T09:36:42.819353+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}