CVE-2026-68474 (GCVE-0-2026-68474)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:39
VLAI
Title
powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access() spufs_mem_mmap_access() computes the local store offset as address - vma->vm_start, but bounds-checks it against vma->vm_end instead of the local store size. On 64-bit, offset is always well below vma->vm_end, so the clamp never fires and len stays unbounded against the LS_SIZE buffer returned by ctx->ops->get_ls(). Reject offsets at or beyond LS_SIZE and clamp len to the remaining space, mirroring the guard already used by spufs_mem_mmap_fault() and spufs_ps_fault().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < aa7aa8ba40c089762d821e3987aaae19e1f5705c (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < d479a7711f8ff127946467b910d947bd971b94ed (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < 9d3569bfdceda69d5ffd5148901e57b69954d9ef (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < d97a8f3668949a8a9d1f6202f8c53446f2d89aa7 (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < 913feef74354c653f10ecd4631df7618a95c49c2 (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < 3c1e92f75e11a11492b8cb901fceeb9f16ae6415 (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < 4efa313b15925bdd864784865d6585174979294b (git)
Affected: a352894d07059649398c4769dc8b645e1a1dad88 , < 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6 (git)
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Linux Linux Affected: 2.6.27
Unaffected: 0 , < 2.6.27 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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-\u003evm_start, but bounds-checks it against vma-\u003evm_end\ninstead of the local store size. On 64-bit, offset is always well\nbelow vma-\u003evm_end, so the clamp never fires and len stays unbounded\nagainst the LS_SIZE buffer returned by ctx-\u003eops-\u003eget_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()."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      },
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    "datePublished": "2026-08-15T05:51:30.918Z",
    "dateReserved": "2026-07-30T09:28:09.396Z",
    "dateUpdated": "2026-08-17T05:39:17.306Z",
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On 64-bit, offset is always well\\nbelow vma-\u003evm_end, so the clamp never fires and len stays unbounded\\nagainst the LS_SIZE buffer returned by ctx-\u003eops-\u003eget_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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/powerpc/platforms/cell/spufs/file.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"aa7aa8ba40c089762d821e3987aaae19e1f5705c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"d479a7711f8ff127946467b910d947bd971b94ed\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"9d3569bfdceda69d5ffd5148901e57b69954d9ef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"d97a8f3668949a8a9d1f6202f8c53446f2d89aa7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"913feef74354c653f10ecd4631df7618a95c49c2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"3c1e92f75e11a11492b8cb901fceeb9f16ae6415\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"4efa313b15925bdd864784865d6585174979294b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a352894d07059649398c4769dc8b645e1a1dad88\",\"lessThan\":\"47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/powerpc/platforms/cell/spufs/file.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.27\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.27\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T16:04:35+00:00",
      "cve": "CVE-2026-68474",
      "id": "CVE-2026-68474",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68474.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.