{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46006", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.092Z", "datePublished": "2026-05-27T12:56:05.273Z", "dateUpdated": "2026-08-05T12:29:06.114Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:06.114Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix u32 overflow in pushbuf reloc bounds check\n\nnouveau_gem_pushbuf_reloc_apply() validates each relocation with\n\n if (r->reloc_bo_offset + 4 > nvbo->bo.base.size)\n\nbut reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer\nliteral 4 promotes to unsigned int, so the addition is performed in 32\nbits and wraps before the comparison against the size_t bo size.\n\nCast to u64 so the addition happens in 64-bit arithmetic.\n\n[ Add Fixes: tag. - Danilo ]" } ], "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 - The bug is reached through the DRM_IOCTL_NOUVEAU_GEM_PUSHBUF ioctl on the local GPU device/render node; it requires local system access, not network or adjacent reachability.\nAC:L - The attacker fully controls the relocation array (reloc_bo_offset, data, presumed fields) and can deterministically set reloc_bo_offset to 0xFFFFFFFC to wrap the check and force the write; there is no race or uncontrolled condition.\nPR:L - NOUVEAU_GEM_PUSHBUF is marked DRM_RENDER_ALLOW, so it is accessible to any unprivileged local user holding the render node (no root or DRM master required).\nUI:N - The attacking process issues the ioctl itself; no action by another user or victim is needed.\nS:U - The out-of-bounds write corrupts kernel memory within the kernel's own security authority and does not cross a VM/IOMMU/sandbox boundary.\nC:H - A controlled out-of-bounds kernel write of this kind is a memory-corruption primitive that can be leveraged to corrupt adjacent structures and ultimately disclose kernel memory.\nI:H - The flaw yields an out-of-bounds write of a largely attacker-controlled 32-bit value into kernel address space, an arbitrary-write-class primitive enabling control-flow/data corruption.\nA:H - The wild write at a fixed ~4 GB offset beyond the buffer mapping almost always hits unmapped/foreign memory, causing a kernel oops or panic." } ] } ], "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_gem.c" ], "versions": [ { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "3429275684f4bad42876955301f3c5c814aae909", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "573a1104bd36e49c067a9dc62e7c476d5ee7e92a", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "45a45184b9c0b0b26ead06e370cda2073616a7cc", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "fa297e919d1680c38ab268ff952b1698dac987f6", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "d749a9a0ee4014681487e7ae549901aa8c176637", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "332884f5eb79dd60a7162b079d09d39208567a31", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "e441d5c23ec644c8d27593db3b8928e8933512a9", "status": "affected", "versionType": "git" }, { "version": "a1606a9596e54da90ad6209071b357a4c1b0fa82", "lessThan": "2fc87d37be1b730a149b035f9375fdb8cc5333a5", "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_gem.c" ], "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.4", "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": "2.6.34", "versionEndExcluding": "5.10.259" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.12.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "6.18.27" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "7.0.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.34", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3429275684f4bad42876955301f3c5c814aae909" }, { "url": "https://git.kernel.org/stable/c/573a1104bd36e49c067a9dc62e7c476d5ee7e92a" }, { "url": "https://git.kernel.org/stable/c/45a45184b9c0b0b26ead06e370cda2073616a7cc" }, { "url": "https://git.kernel.org/stable/c/fa297e919d1680c38ab268ff952b1698dac987f6" }, { "url": "https://git.kernel.org/stable/c/d749a9a0ee4014681487e7ae549901aa8c176637" }, { "url": "https://git.kernel.org/stable/c/332884f5eb79dd60a7162b079d09d39208567a31" }, { "url": "https://git.kernel.org/stable/c/e441d5c23ec644c8d27593db3b8928e8933512a9" }, { "url": "https://git.kernel.org/stable/c/2fc87d37be1b730a149b035f9375fdb8cc5333a5" } ], "title": "drm/nouveau: fix u32 overflow in pushbuf reloc bounds check", "x_generator": { "engine": "bippy-1.2.0" } } } }