{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-63847", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.016Z", "datePublished": "2026-07-19T14:04:40.248Z", "dateUpdated": "2026-08-05T12:36:25.201Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:36:25.201Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)" } ], "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 - Exploitation requires issuing DRM_IOCTL_AMDGPU_CS against /dev/dri/renderD* on a system with an affected AMD Instinct GPU (MI100/MI200); this is a local ioctl path, not reachable over the network.\nAC:L - An attacker with render-node access can deterministically submit a JPEG-ring command buffer (AMDGPU_HW_IP_VCN_JPEG) with an AMDGPU_CHUNK_ID_FENCE chunk; no race or special system state is required beyond the vulnerable hardware being present.\nPR:L - The amdgpu_cs_ioctl entry point requires only DRM render-client access (DRM_AUTH|DRM_RENDER_ALLOW), which is granted to unprivileged local users in the render/video group or cloud GPU tenants with device access—not root or CAP_SYS_ADMIN.\nUI:N - Exploitation is fully programmatic via ioctl submission and does not require any action from another user or administrator.\nS:U - The corrupting GPU fence write is issued within the attacker's own DRM/GPU context and VM; impact remains within the same security authority and does not constitute a demonstrated VM escape or IOMMU boundary bypass.\nC:H - The malformed 64-bit user fence write on unsupported JPEG hardware causes GPU-initiated memory corruption at an attacker-chosen address, which can be leveraged for arbitrary memory disclosure beyond a bounded leak.\nI:H - The vulnerability gives the attacker a GPU DMA write primitive to user-specified GPU-mapped memory, enabling arbitrary data modification and potential further exploitation such as privilege escalation.\nA:H - Triggering an unsupported 64-bit fence operation on the JPEG engine can cause GPU faults, driver hangs, or kernel oops/panic, impacting system availability." } ] } ], "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/jpeg_v2_5.c" ], "versions": [ { "version": "14f43e8f88c57bbeaed3d05f13efab733f5e2338", "lessThan": "63691e396105611173072ad548fc2b68831ecf23", "status": "affected", "versionType": "git" }, { "version": "14f43e8f88c57bbeaed3d05f13efab733f5e2338", "lessThan": "4d96e3cbfc66e4d66ea0096bde858e28ab62da00", "status": "affected", "versionType": "git" }, { "version": "14f43e8f88c57bbeaed3d05f13efab733f5e2338", "lessThan": "3a96fee676fc0caf08f03ad915bec6fcd144d551", "status": "affected", "versionType": "git" }, { "version": "14f43e8f88c57bbeaed3d05f13efab733f5e2338", "lessThan": "694fe016969c5e5a24b9e0ef7c1307eedec8ddf8", "status": "affected", "versionType": "git" }, { "version": "14f43e8f88c57bbeaed3d05f13efab733f5e2338", "lessThan": "79405e774ede411c6b47ed41c651e40b92de64a2", "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/jpeg_v2_5.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "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": "5.6", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/63691e396105611173072ad548fc2b68831ecf23" }, { "url": "https://git.kernel.org/stable/c/4d96e3cbfc66e4d66ea0096bde858e28ab62da00" }, { "url": "https://git.kernel.org/stable/c/3a96fee676fc0caf08f03ad915bec6fcd144d551" }, { "url": "https://git.kernel.org/stable/c/694fe016969c5e5a24b9e0ef7c1307eedec8ddf8" }, { "url": "https://git.kernel.org/stable/c/79405e774ede411c6b47ed41c651e40b92de64a2" } ], "title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring", "x_generator": { "engine": "bippy-1.2.0" } } } }