CVE-2026-46218

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The caller\nis responsible for making sure it can handle arbitrary return values.\n\nAlso make the idx a uint32_t to prevent overflows causing the condition\nto fail."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Triggered through the amdgpu command-submission ioctl (DRM_IOCTL_AMDGPU_CS), a local device-file interface; there is no network or adjacent-network path to the IB parser.\nAC:L - The attacker fully controls the IB contents and length, so a command stream that places the last command near the buffer end reliably forces the out-of-bounds access on every attempt.\nPR:L - The CS ioctl is DRM_RENDER_ALLOW, reachable through the render node (/dev/dri/renderD*) by any unprivileged local user (e.g. desktop/Android VA-API video decode/encode); no root, DRM master, or capability is required.\nUI:N - The attacking process submits the malicious command buffer itself; no action by another user is needed.\nS:U - The out-of-bounds access occurs in CPU-side kernel memory during command parsing, within the kernel's own security authority \u2014 no VM, IOMMU, or sandbox boundary is crossed.\nC:H - An attacker-controlled out-of-bounds read reads kernel IB-pool memory adjacent to the buffer; it is not strictly bounded (vcn_v4_0_enc_find_ib_param walks past the end with no limit) and the read values feed address/buffer processing, so per kernel guidance an unbounded OOB read is High.\nI:N - The defect is a read-only out-of-bounds access; all amdgpu_ib_set_value sites are already bounded by their callers, so there is no out-of-bounds write or other data-modification primitive.\nA:H - Reading past the end of the kernel sub-allocated IB pool buffer can hit an unmapped page and oops the kernel, and the unbounded VCN v4 parse walk can run far past the buffer, causing a crash/DoS."}]}], "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_ring.h"], "versions": [{"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "5da6c6430be0acb25b4242bce0323fc514d4e3cf", "status": "affected", "versionType": "git"}, {"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "0fb5cb556b249b2b64c0f818136c4c3e838ef53f", "status": "affected", "versionType": "git"}, {"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "a853178d23e774adfe3a35073c375b04b3b20f7d", "status": "affected", "versionType": "git"}, {"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "fec8b11b55e53ff51a741e56894fe331a516f5c6", "status": "affected", "versionType": "git"}, {"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "ee26fcf7c5cf131f0b6a732faa27d79ec61b8ec7", "status": "affected", "versionType": "git"}, {"version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "66085e206431ef88ce36f53c1f53d570790ccc9e", "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_ring.h"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.90", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "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": "4.2", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.12.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.18.32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5da6c6430be0acb25b4242bce0323fc514d4e3cf"}, {"url": "https://git.kernel.org/stable/c/0fb5cb556b249b2b64c0f818136c4c3e838ef53f"}, {"url": "https://git.kernel.org/stable/c/a853178d23e774adfe3a35073c375b04b3b20f7d"}, {"url": "https://git.kernel.org/stable/c/fec8b11b55e53ff51a741e56894fe331a516f5c6"}, {"url": "https://git.kernel.org/stable/c/ee26fcf7c5cf131f0b6a732faa27d79ec61b8ec7"}, {"url": "https://git.kernel.org/stable/c/66085e206431ef88ce36f53c1f53d570790ccc9e"}], "title": "drm/amdgpu: Add bounds checking to ib_{get,set}_value", "x_generator": {"engine": "bippy-1.2.0"}}}}

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Check the bounds here. The caller\nis responsible for making sure it can handle arbitrary return values.\n\nAlso make the idx a uint32_t to prevent overflows causing the condition\nto fail."}], "id": "CVE-2026-46218", "lastModified": "2026-06-17T10:53:21.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-28T10:16:37.423", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0fb5cb556b249b2b64c0f818136c4c3e838ef53f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5da6c6430be0acb25b4242bce0323fc514d4e3cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66085e206431ef88ce36f53c1f53d570790ccc9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a853178d23e774adfe3a35073c375b04b3b20f7d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee26fcf7c5cf131f0b6a732faa27d79ec61b8ec7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fec8b11b55e53ff51a741e56894fe331a516f5c6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amdgpu: Add bounds checking to ib_{get,set}_value", "id": "2482567", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482567"}, "csaw": false, "cwe": "CWE-131", "details": ["A flaw was found in the Linux kernel's drm/amdgpu driver. The uvd/vce/vcn code accesses the Instruction Buffer (IB) without sufficient bounds checking, which could allow an attacker to trigger an out-of-bounds memory access. This vulnerability may lead to system instability or a denial of service."], "name": "CVE-2026-46218", "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": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46218\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46218\nhttps://lore.kernel.org/linux-cve-announce/2026052836-CVE-2026-46218-a849@gregkh/T"]}

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