Vulnerability-Lookup

GHSA-G9QW-R5FH-4WJP

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68474"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:20:34Z",
    "severity": "HIGH"
  },
  "details": "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().",
  "id": "GHSA-g9qw-r5fh-4wjp",
  "modified": "2026-08-17T06:33:03Z",
  "published": "2026-08-15T06:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68474"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa7aa8ba40c089762d821e3987aaae19e1f5705c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d479a7711f8ff127946467b910d947bd971b94ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d97a8f3668949a8a9d1f6202f8c53446f2d89aa7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:39

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

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6633 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/aa7aa8ba40c089762…
https://git.kernel.org/stable/c/d479a7711f8ff1279…
https://git.kernel.org/stable/c/9d3569bfdceda69d5…
https://git.kernel.org/stable/c/d97a8f3668949a8a9…
https://git.kernel.org/stable/c/913feef74354c653f…
https://git.kernel.org/stable/c/3c1e92f75e11a1149…
https://git.kernel.org/stable/c/4efa313b15925bdd8…
https://git.kernel.org/stable/c/47b87f469a35b5ffc…

Impacted products

2 products

Vendor	Product	Version
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)
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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JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/platforms/cell/spufs/file.c"
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            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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        }
      ],
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        "dateUpdated": "2026-08-17T05:39:17.306Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68474",
    "datePublished": "2026-08-15T05:51:30.918Z",
    "dateReserved": "2026-07-30T09:28:09.396Z",
    "dateUpdated": "2026-08-17T05:39:17.306Z",
    "state": "PUBLISHED"
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-G9QW-R5FH-4WJP

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

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Related by attack behaviour