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vuln-cve/data/2026/68xxx/CVE-2026-68474.json
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{
"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"
},
{
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"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": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.27",
"versionEndExcluding": "5.10.261"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.27",
"versionEndExcluding": "7.1.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.27",
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/aa7aa8ba40c089762d821e3987aaae19e1f5705c"
},
{
"url": "https://git.kernel.org/stable/c/d479a7711f8ff127946467b910d947bd971b94ed"
},
{
"url": "https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef"
},
{
"url": "https://git.kernel.org/stable/c/d97a8f3668949a8a9d1f6202f8c53446f2d89aa7"
},
{
"url": "https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2"
},
{
"url": "https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415"
},
{
"url": "https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b"
},
{
"url": "https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6"
}
],
"title": "powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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