{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80582", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.769Z", "datePublished": "2026-08-26T14:37:39.113Z", "dateUpdated": "2026-08-27T05:02:02.758Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-27T05:02:02.758Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/shmem_helper: Check VMA boundaries for PMD mappings\n\nIn the ->huge_fault handler do not install a PMD huge page\nmapping if the huge page exceeds the boundaries of the VMA.\n\nAll other ->huge_fault handlers have similar checks and the\nresulting mapping will trigger a VM_BUG_ON_VMA() if it ever\nreaches copy_pmd_range()."}], "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 - Reachable via local mmap/page-fault on DRM GEM shmem buffers (drm_gem_mmap -> drm_gem_shmem_any_fault -> try_insert_pfn PMD path), used by virtio-gpu, panfrost, lima, v3d, panthor, and other GPU/accelerator drivers on phones, VMs, and desktops.\nAC:L - An attacker controls GEM buffer size, mmap length, fault addresses, and follow-on fork/mprotect; no race or rare layout is required beyond creating a non-PMD-aligned mapping near a VMA end so a 2MB PMD install overruns the VMA.\nPR:L - Only standard local GPU access is needed (open /dev/dri/renderD* or card*, DRM GEM create/mmap ioctls); no CAP_SYS_ADMIN or init-namespace root, matching unprivileged desktop render-group users, Android GPU apps, and cloud/VM GPU workloads.\nUI:N - Exploitation is fully attacker-driven through their own DRM client (create buffer, mmap, touch pages, fork); no separate victim action such as opening a file or mounting a filesystem is required.\nS:U - Impact stays within the kernel/GPU process security boundary (local memory corruption and kernel panic); it does not cross VM/host, IOMMU, or sandbox authority boundaries.\nC:H - Without the VMA boundary check, a 2MB PMD PFNMAP can cover virtual/physical pages beyond the GEM object and VMA, creating out-of-bounds read primitives from adjacent mapped memory before copy_pmd_range() trips VM_BUG_ON_VMA().\nI:H - The same oversized PMD mapping installs writable PFNMAP entries beyond the allocated buffer, enabling out-of-bounds writes and corrupt page tables exploitable for control-flow or data tampering, not merely a clean fault.\nA:H - The invalid PMD eventually hits VM_BUG_ON_VMA() in copy_pmd_range() or __split_huge_pmd() (e.g., fork of the mapping), producing a kernel BUG/oops and panic as demonstrated in related drm/shmem_helper THP testing."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/drm_gem_shmem_helper.c"], "versions": [{"version": "fc3bbf34e643faa8678aabdc3810c60109f3435a", "lessThan": "12803e89a1e593fd1e784dfe7453f5e392ccaff2", "status": "affected", "versionType": "git"}, {"version": "fc3bbf34e643faa8678aabdc3810c60109f3435a", "lessThan": "617bbd08714857c1613d7c550d43a9092ec0fb97", "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/drm_gem_shmem_helper.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "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": "7.0", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/12803e89a1e593fd1e784dfe7453f5e392ccaff2"}, {"url": "https://git.kernel.org/stable/c/617bbd08714857c1613d7c550d43a9092ec0fb97"}], "title": "drm/shmem_helper: Check VMA boundaries for PMD mappings", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/drm_gem_shmem_helper.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "12803e89a1e593fd1e784dfe7453f5e392ccaff2", "status": "affected", "version": "fc3bbf34e643faa8678aabdc3810c60109f3435a", "versionType": "git"}, {"lessThan": "617bbd08714857c1613d7c550d43a9092ec0fb97", "status": "affected", "version": "fc3bbf34e643faa8678aabdc3810c60109f3435a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/drm_gem_shmem_helper.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "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/shmem_helper: Check VMA boundaries for PMD mappings\n\nIn the ->huge_fault handler do not install a PMD huge page\nmapping if the huge page exceeds the boundaries of the VMA.\n\nAll other ->huge_fault handlers have similar checks and the\nresulting mapping will trigger a VM_BUG_ON_VMA() if it ever\nreaches copy_pmd_range()."}], "id": "CVE-2026-80582", "lastModified": "2026-08-27T06:17:44.570", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-26T15:17:14.337", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12803e89a1e593fd1e784dfe7453f5e392ccaff2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/617bbd08714857c1613d7c550d43a9092ec0fb97"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc3bbf34e643faa8678aabdc3810c60109f3435a,12803e89a1e593fd1e784dfe7453f5e392ccaff2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc3bbf34e643faa8678aabdc3810c60109f3435a,617bbd08714857c1613d7c550d43a9092ec0fb97)"}}], "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": "semver", "value": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.10,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-08-26T16:30:09.773031+00:00", "updated": "2026-08-26T21:00:11.422878+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-788"]}