CVE-2026-93823

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93823", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.792Z", "datePublished": "2026-09-24T16:03:01.639Z", "dateUpdated": "2026-10-30T12:36:51.053Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:36:51.053Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl\n\namdkfd driver needs allocate buffer to return bo metadata to user space. The\nbuffer size is controlled by user currently. It is a potential security issue\nthat hostile value (e.g. 2 GiB) lets any render-group user trigger order-MAX\nallocation/OOM in kernel context.\n\nThis patch first finds bo metadata size. If the size is smaller than user\nprovided value drive can safely allocate buffer in kernel space and copy to\nuser space buffer. If not, driver will let user know, not allocate and copy.\nUser will redo with new buffer in user space.\n\nThis patch lets driver decide buffer allocation size to avoid potential hostile\nsize from user space.\n\n(cherry picked from commit f54ce9e8cbd3abe0eda3a285f54dc4f572fe589a)"}], "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_amdkfd.c", "drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h", "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "versions": [{"version": "1dde0ea95b782425b95455d487cb44991525a1d1", "lessThan": "d298c100796b2cd1e7e75f8e615b79d034e510f8", "status": "affected", "versionType": "git"}, {"version": "1dde0ea95b782425b95455d487cb44991525a1d1", "lessThan": "d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228", "status": "affected", "versionType": "git"}, {"version": "1dde0ea95b782425b95455d487cb44991525a1d1", "lessThan": "a65ccabde6deb95baf9442bd98299e2248884162", "status": "affected", "versionType": "git"}, {"version": "1dde0ea95b782425b95455d487cb44991525a1d1", "lessThan": "2d9fd0f01550aab4a0a1984b4379e50545906248", "status": "affected", "versionType": "git"}, {"version": "1dde0ea95b782425b95455d487cb44991525a1d1", "lessThan": "8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15", "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_amdkfd.c", "drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h", "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d298c100796b2cd1e7e75f8e615b79d034e510f8"}, {"url": "https://git.kernel.org/stable/c/d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228"}, {"url": "https://git.kernel.org/stable/c/a65ccabde6deb95baf9442bd98299e2248884162"}, {"url": "https://git.kernel.org/stable/c/2d9fd0f01550aab4a0a1984b4379e50545906248"}, {"url": "https://git.kernel.org/stable/c/8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15"}], "title": "drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c", "drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h", "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d298c100796b2cd1e7e75f8e615b79d034e510f8", "status": "affected", "version": "1dde0ea95b782425b95455d487cb44991525a1d1", "versionType": "git"}, {"lessThan": "d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228", "status": "affected", "version": "1dde0ea95b782425b95455d487cb44991525a1d1", "versionType": "git"}, {"lessThan": "a65ccabde6deb95baf9442bd98299e2248884162", "status": "affected", "version": "1dde0ea95b782425b95455d487cb44991525a1d1", "versionType": "git"}, {"lessThan": "2d9fd0f01550aab4a0a1984b4379e50545906248", "status": "affected", "version": "1dde0ea95b782425b95455d487cb44991525a1d1", "versionType": "git"}, {"lessThan": "8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15", "status": "affected", "version": "1dde0ea95b782425b95455d487cb44991525a1d1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c", "drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h", "drivers/gpu/drm/amd/amdkfd/kfd_chardev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl\n\namdkfd driver needs allocate buffer to return bo metadata to user space. The\nbuffer size is controlled by user currently. It is a potential security issue\nthat hostile value (e.g. 2 GiB) lets any render-group user trigger order-MAX\nallocation/OOM in kernel context.\n\nThis patch first finds bo metadata size. If the size is smaller than user\nprovided value drive can safely allocate buffer in kernel space and copy to\nuser space buffer. If not, driver will let user know, not allocate and copy.\nUser will redo with new buffer in user space.\n\nThis patch lets driver decide buffer allocation size to avoid potential hostile\nsize from user space.\n\n(cherry picked from commit f54ce9e8cbd3abe0eda3a285f54dc4f572fe589a)"}], "id": "CVE-2026-93823", "lastModified": "2026-10-30T13:21:03.460", "metrics": {}, "published": "2026-09-24T17:17:15.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d9fd0f01550aab4a0a1984b4379e50545906248"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a65ccabde6deb95baf9442bd98299e2248884162"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d298c100796b2cd1e7e75f8e615b79d034e510f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d51841bb5ceee75ec3aeeb4e5c51c8e5e7524228"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl", "id": "2540385", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540385"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdkfd: Let driver decide buffer size at AMDKFD_IOC_GET_DMABUF_INFO ioctl\namdkfd driver needs allocate buffer to return bo metadata to user space. The\nbuffer size is controlled by user currently. It is a potential security issue\nthat hostile value (e.g. 2 GiB) lets any render-group user trigger order-MAX\nallocation/OOM in kernel context.\nThis patch first finds bo metadata size. If the size is smaller than user\nprovided value drive can safely allocate buffer in kernel space and copy to\nuser space buffer. If not, driver will let user know, not allocate and copy.\nUser will redo with new buffer in user space.\nThis patch lets driver decide buffer allocation size to avoid potential hostile\nsize from user space.\n(cherry picked from commit f54ce9e8cbd3abe0eda3a285f54dc4f572fe589a)", "A flaw was found in the Linux kernel's AMD GPU driver (amdkfd). A local user with access to the GPU device interface can trigger excessive kernel memory allocation by providing an abnormally large buffer size parameter during an input/output control (ioctl) request. This issue can exhaust system memory and trigger an out-of-memory condition, leading to a Denial of Service (DoS)."], "name": "CVE-2026-93823", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93823\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93823\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93823.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a65ccabde6deb95baf9442bd98299e2248884162)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2d9fd0f01550aab4a0a1984b4379e50545906248)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8242a8d9d7194d5ef8a8b38a5621ca0966a3ec15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-24T23:00:14.430977+00:00", "updated": "2026-10-01T17:15:10.309988+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}