CVE-2026-98518

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98518", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.354Z", "datePublished": "2026-10-18T15:17:36.371Z", "dateUpdated": "2026-10-24T14:09:15.821Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:15.821Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/dmem: pin VRAM for the whole registered range\n\nCommit c32287471077 (\"gpu/drm/nouveau: enable THP support for GPU memory\nmigration\") grew the device-private region that\nnouveau_dmem_chunk_alloc() registers from DMEM_CHUNK_SIZE to\nDMEM_CHUNK_SIZE * NR_CHUNKS, but left the VRAM buffer object backing that\nregion at DMEM_CHUNK_SIZE.\n\nnouveau_dmem_page_addr() returns chunk->bo->offset plus the page's offset\nwithin the registered region, so every page past the first chunk resolves\nto VRAM outside the buffer object.\n\nSize the buffer object to the region it backs."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - ioctl(DRM_IOCTL_NOUVEAU_SVM_BIND) reaches nouveau_svmm_bind(), nouveau_dmem_migrate_vma(), nouveau_dmem_migrate_chunk(), nouveau_dmem_migrate_copy_one(), nouveau_dmem_page_alloc_locked(), then patched nouveau_dmem_chunk_alloc(); the triggering VMA and request come from a local process.\nAC:H - The path needs CONFIG_DRM_NOUVEAU_SVM, an EXPERIMENTAL default-n option depending on STAGING; nouveau_svm_init() also rejects GPUs newer than Pascal while nouveau_dmem_init() rejects older ones. The attacker cannot create these host build and hardware conditions.\nPR:L - NOUVEAU_SVM_INIT and NOUVEAU_SVM_BIND are registered with DRM_RENDER_ALLOW and neither DRM_ROOT_ONLY nor DRM_AUTH; an ordinary user able to open the Nouveau render node can initialize SVM and migrate their own VMA without capabilities.\nUI:N - The attacking process itself issues SVM_INIT and SVM_BIND and accesses its migrated VMA to trigger migration or readback; no victim must mount, open, or approve anything.\nS:U - nouveau_dmem_page_addr() supplies an invalid LOCAL_FB VRAM address to the same host's Nouveau copy engine and VMM; the code demonstrates a VRAM BO boundary violation, not a VM escape or IOMMU/DMA boundary bypass.\nC:H - nouveau_pfns_map() installs the out-of-BO VRAM PFN in the caller's SVM VMM, and a CPU fault invokes nouveau_dmem_migrate_to_ram() and nouveau_dmem_copy_folio() to copy from that physical VRAM address into a user page, permitting disclosure from overlapping VRAM allocations.\nI:H - nouveau_dmem_migrate_copy_one() passes the out-of-BO paddr to nvc0b5_migrate_copy() as a physical LOCAL_FB destination and sets a writable PFN for writable VMAs, enabling attacker-controlled writes into other VRAM allocations.\nA:H - The unchecked nvc0b5_migrate_copy() physical destination can overwrite active VRAM BOs or fall beyond installed VRAM, faulting or hanging the GPU and denying graphics and compute service to all clients."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_dmem.c"], "versions": [{"version": "c3228747107705d47c7e9a03598a434a0380cb73", "lessThan": "06c69c64686a31783c8bec6495dc22822d38c4ce", "status": "affected", "versionType": "git"}, {"version": "c3228747107705d47c7e9a03598a434a0380cb73", "lessThan": "64ca4cdd1031206424e6455f0ae4fb0560d8f46a", "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/nouveau/nouveau_dmem.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.19", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/06c69c64686a31783c8bec6495dc22822d38c4ce"}, {"url": "https://git.kernel.org/stable/c/64ca4cdd1031206424e6455f0ae4fb0560d8f46a"}], "title": "drm/nouveau/dmem: pin VRAM for the whole registered range", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_dmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "06c69c64686a31783c8bec6495dc22822d38c4ce", "status": "affected", "version": "c3228747107705d47c7e9a03598a434a0380cb73", "versionType": "git"}, {"lessThan": "64ca4cdd1031206424e6455f0ae4fb0560d8f46a", "status": "affected", "version": "c3228747107705d47c7e9a03598a434a0380cb73", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_dmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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/nouveau/dmem: pin VRAM for the whole registered range\n\nCommit c32287471077 (\"gpu/drm/nouveau: enable THP support for GPU memory\nmigration\") grew the device-private region that\nnouveau_dmem_chunk_alloc() registers from DMEM_CHUNK_SIZE to\nDMEM_CHUNK_SIZE * NR_CHUNKS, but left the VRAM buffer object backing that\nregion at DMEM_CHUNK_SIZE.\n\nnouveau_dmem_page_addr() returns chunk->bo->offset plus the page's offset\nwithin the registered region, so every page past the first chunk resolves\nto VRAM outside the buffer object.\n\nSize the buffer object to the region it backs."}], "id": "CVE-2026-98518", "lastModified": "2026-10-24T14:16:45.813", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-18T16:17:03.163", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06c69c64686a31783c8bec6495dc22822d38c4ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64ca4cdd1031206424e6455f0ae4fb0560d8f46a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/nouveau/dmem: pin VRAM for the whole registered range", "id": "2554887", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554887"}, "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-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/nouveau/dmem: pin VRAM for the whole registered range\nCommit c32287471077 (\"gpu/drm/nouveau: enable THP support for GPU memory\nmigration\") grew the device-private region that\nnouveau_dmem_chunk_alloc() registers from DMEM_CHUNK_SIZE to\nDMEM_CHUNK_SIZE * NR_CHUNKS, but left the VRAM buffer object backing that\nregion at DMEM_CHUNK_SIZE.\nnouveau_dmem_page_addr() returns chunk->bo->offset plus the page's offset\nwithin the registered region, so every page past the first chunk resolves\nto VRAM outside the buffer object.\nSize the buffer object to the region it backs.", "A flaw was found in the Linux kernel's Nouveau graphics driver. This vulnerability allows a local user to cause a denial of service (DoS) or system instability through an out-of-bounds memory access in video random-access memory (VRAM). The issue occurs because the driver fails to allocate an adequately sized buffer object to back the full registered device memory range. As a result, memory requests referencing pages past the initial chunk access memory outside the buffer boundaries."], "name": "CVE-2026-98518", "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"}, {"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": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98518\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98518\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98518.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3228747107705d47c7e9a03598a434a0380cb73,06c69c64686a31783c8bec6495dc22822d38c4ce)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3228747107705d47c7e9a03598a434a0380cb73,64ca4cdd1031206424e6455f0ae4fb0560d8f46a)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T17:45:06.374213+00:00", "updated": "2026-10-24T15:45:07.132564+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}