CVE-2026-68474

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68474", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.396Z", "datePublished": "2026-08-15T05:51:30.918Z", "dateUpdated": "2026-08-17T05:39:17.306Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:17.306Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()\n\nspufs_mem_mmap_access() computes the local store offset as\naddress - vma->vm_start, but bounds-checks it against vma->vm_end\ninstead of the local store size. On 64-bit, offset is always well\nbelow vma->vm_end, so the clamp never fires and len stays unbounded\nagainst the LS_SIZE buffer returned by ctx->ops->get_ls().\n\nReject offsets at or beyond LS_SIZE and clamp len to the remaining\nspace, mirroring the guard already used by spufs_mem_mmap_fault() and\nspufs_ps_fault()."}], "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 only through local kernel interfaces (spu_create, mmap of spufs \"mem\", then /proc/self/mem or ptrace/GDB via access_remote_vm); there is no network, adjacent-radio, or physical-device attack path.\nAC:L - An attacker who can map spufs local store fully controls the VMA address and transfer length; the broken bounds check fails deterministically on 64-bit, so no races or victim-specific layout are required.\nPR:L - On Cell systems with spufs mounted, spu_create and the world-readable/writable mem node (0666) require only a local unprivileged account with write access to the spufs mount, not real init-namespace root or non-namespace capabilities.\nUI:N - Exploitation is self-contained: the attacker creates/maps their own SPU context and triggers the flaw through /proc/self/mem or debugging APIs without any separate victim action.\nS:U - Impact is kernel memory corruption and disclosure within the host kernel from a local user context; it does not cross a VM, container, or IOMMU security boundary to another authority.\nC:H - memcpy_fromio with an unclamped length reads well past the 256KB LS_SIZE buffer (vmalloc heap after lscsa or beyond the ioremap), enabling substantial out-of-bounds kernel memory disclosure.\nI:H - memcpy_toio with the same faulty bounds allows out-of-bounds writes past the local-store mapping, corrupting adjacent kernel memory and supporting further privilege escalation or code execution.\nA:H - Out-of-bounds MMIO/vmalloc access can provoke immediate kernel faults/oops/panics, and heap corruption from oversized writes can crash or hang the system during exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/platforms/cell/spufs/file.c"], "versions": [{"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "aa7aa8ba40c089762d821e3987aaae19e1f5705c", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "d479a7711f8ff127946467b910d947bd971b94ed", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "9d3569bfdceda69d5ffd5148901e57b69954d9ef", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "d97a8f3668949a8a9d1f6202f8c53446f2d89aa7", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "913feef74354c653f10ecd4631df7618a95c49c2", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "3c1e92f75e11a11492b8cb901fceeb9f16ae6415", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "4efa313b15925bdd864784865d6585174979294b", "status": "affected", "versionType": "git"}, {"version": "a352894d07059649398c4769dc8b645e1a1dad88", "lessThan": "47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/platforms/cell/spufs/file.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/cell/spufs/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "aa7aa8ba40c089762d821e3987aaae19e1f5705c", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "d479a7711f8ff127946467b910d947bd971b94ed", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "9d3569bfdceda69d5ffd5148901e57b69954d9ef", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "d97a8f3668949a8a9d1f6202f8c53446f2d89aa7", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "913feef74354c653f10ecd4631df7618a95c49c2", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "3c1e92f75e11a11492b8cb901fceeb9f16ae6415", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "4efa313b15925bdd864784865d6585174979294b", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}, {"lessThan": "47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6", "status": "affected", "version": "a352894d07059649398c4769dc8b645e1a1dad88", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/cell/spufs/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.27"}, {"lessThan": "2.6.27", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "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\npowerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()\n\nspufs_mem_mmap_access() computes the local store offset as\naddress - vma->vm_start, but bounds-checks it against vma->vm_end\ninstead of the local store size. On 64-bit, offset is always well\nbelow vma->vm_end, so the clamp never fires and len stays unbounded\nagainst the LS_SIZE buffer returned by ctx->ops->get_ls().\n\nReject offsets at or beyond LS_SIZE and clamp len to the remaining\nspace, mirroring the guard already used by spufs_mem_mmap_fault() and\nspufs_ps_fault()."}], "id": "CVE-2026-68474", "lastModified": "2026-08-17T06:17:56.837", "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": "2026-08-15T06:20:34.937", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa7aa8ba40c089762d821e3987aaae19e1f5705c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d479a7711f8ff127946467b910d947bd971b94ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d97a8f3668949a8a9d1f6202f8c53446f2d89aa7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()", "id": "2516371", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516371"}, "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": ["A flaw was found in the Linux kernel, specifically within the powerpc/spufs component responsible for managing memory access. This vulnerability allows for an out-of-bounds memory access due to incorrect boundary checks in the `spufs_mem_mmap_access()` function. An attacker could exploit this to corrupt memory, potentially leading to system instability (denial of service) or unauthorized privilege escalation."], "name": "CVE-2026-68474", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68474\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68474\nhttps://lore.kernel.org/linux-cve-announce/2026081505-CVE-2026-68474-f8a6@gregkh/T"], "threat_severity": "Moderate"}

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