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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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    "dateReserved": "2026-07-30T09:28:09.396Z",
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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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        "published": "2026-08-15T06:20:34.937",
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        "vulnStatus": "Received"
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      "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"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-15T01:33:08Z",
      "cve": "CVE-2026-68474",
      "id": "CVE-2026-68474",
      "initial_release_date": "2026-08-26T01:15:19Z",
      "product_status:known_affected": "362",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68474",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68474.json",
      "version": "4"
    }
  }
}



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Tags
Taxonomy of the tags.





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

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.