CVE-2026-63847

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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\u2014not 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 - 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{"bugzilla": {"description": "kernel: drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring", "id": "2502275", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502275"}, "csaw": false, "cwe": "CWE-1287", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)", "A flaw was found in the Linux kernel's AMD GPU JPEG driver. This issue occurs because the JPEG hardware component does not properly handle certain types of graphics commands, specifically 64-bit user fence writes. An attacker could craft and submit malicious commands, causing the system to reject these submissions. This could lead to a denial of service, making the graphics functionality unavailable."], "name": "CVE-2026-63847", "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": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63847\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63847\nhttps://lore.kernel.org/linux-cve-announce/2026071930-CVE-2026-63847-2fb3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[14f43e8f88c57bbeaed3d05f13efab733f5e2338,63691e396105611173072ad548fc2b68831ecf23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[14f43e8f88c57bbeaed3d05f13efab733f5e2338,4d96e3cbfc66e4d66ea0096bde858e28ab62da00)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[14f43e8f88c57bbeaed3d05f13efab733f5e2338,3a96fee676fc0caf08f03ad915bec6fcd144d551)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[14f43e8f88c57bbeaed3d05f13efab733f5e2338,694fe016969c5e5a24b9e0ef7c1307eedec8ddf8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[14f43e8f88c57bbeaed3d05f13efab733f5e2338,79405e774ede411c6b47ed41c651e40b92de64a2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.141,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.91,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.33,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.10,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-21T02:45:02.819303+00:00", "updated": "2026-10-23T08:30:09.475618+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}