{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53374", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.401Z", "datePublished": "2026-07-19T10:01:58.292Z", "dateUpdated": "2026-08-05T12:35:18.594Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:35:18.594Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: zero-initialize GART table on allocation\n\nGART TLB is flushed after unmapping but not after mapping. Since\namdgpu_bo_create_kernel() does not zero-initialize the buffer, when a\nsingle PTE is written the TLB may speculatively load other uninitialized\nentries from the same cacheline. Those garbage entries can appear valid,\nand a subsequent write to another PTE in the same cacheline may cause the\nGPU to use a stale garbage PTE from the TLB.\n\nFix this by calling memset_io() to zero-initialize the GART table with\ngart_pte_flags immediately after allocation.\n\nUsing AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work\nsince SDMA needs GART to be initialized to work.\n\n(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached when a local process with access to /dev/dri/renderD* issues AMDGPU DRM ioctls (GEM_CREATE, CS) that bind GTT buffers through amdgpu_ttm_backend_bind() → amdgpu_gart_bind(), writing GART PTEs without a TLB flush. This is a local GPU driver ioctl path, not a network protocol.\nAC:L - An attacker with render-node access can reliably trigger GART PTE writes by allocating and binding GTT-domain buffers via standard ioctls; they control mapping timing and concurrency. Uninitialized VRAM contents at driver init are not an attacker-uncontrollable gate for triggering the stale-TLB condition.\nPR:L - All AMDGPU GEM/CS ioctls require DRM_AUTH|DRM_RENDER_ALLOW, which is satisfied by membership in the render/video group on typical desktop, workstation, and cloud-GPU instances—not real root in the init namespace.\nUI:N - Exploitation requires only programmatic ioctl and GPU command submission; no victim interaction such as opening files or mounting filesystems is needed beyond the attacker already having render-node access.\nS:C - Stale garbage GART PTEs in the GPU TLB can cause the GPU to DMA to/from arbitrary physical pages outside the driver's intended mappings, bypassing the GART/IOMMU address-translation boundary that is supposed to confine GPU memory access.\nC:H - Speculatively loaded garbage PTEs that appear valid can redirect GPU reads to unintended physical memory, including kernel and other processes' pages, constituting arbitrary memory disclosure via rogue DMA.\nI:H - Those same stale valid PTEs can redirect GPU writes to arbitrary physical addresses, enabling arbitrary memory corruption and potential code execution through DMA write primitives.\nA:H - GPU DMA through invalid or garbage PTEs to unintended physical addresses can cause IOMMU faults, machine checks, GPU hangs, or kernel oops/panic, producing full system availability loss." } ] } ], "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_gart.c" ], "versions": [ { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "40df11255d71b02e20e70579f1b12b687e396e26", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "91fbb5e635c8fb1b49e15c19da06480089ef719f", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "8ae8b9e74bab94aab1d79f1688129bcc61c8b29a", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "b17175d0a375b3ed5e81597dac4983fdb46e478d", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "791941be5da125d9a1b228582bfdc300c05d05b3", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741", "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_gart.c" ], "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/40df11255d71b02e20e70579f1b12b687e396e26" }, { "url": "https://git.kernel.org/stable/c/91fbb5e635c8fb1b49e15c19da06480089ef719f" }, { "url": "https://git.kernel.org/stable/c/8ae8b9e74bab94aab1d79f1688129bcc61c8b29a" }, { "url": "https://git.kernel.org/stable/c/b17175d0a375b3ed5e81597dac4983fdb46e478d" }, { "url": "https://git.kernel.org/stable/c/791941be5da125d9a1b228582bfdc300c05d05b3" }, { "url": "https://git.kernel.org/stable/c/e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741" } ], "title": "drm/amdgpu: zero-initialize GART table on allocation", "x_generator": { "engine": "bippy-1.2.0" } } } }