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CVE-2026-89613 (GCVE-0-2026-89613)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:45 – Updated: 2026-09-13 06:31
VLAI
Title
ntfs: reject invalid empty mapping pairs
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: reject invalid empty mapping pairs Reject an attribute with empty mapping pairs if it has inconsistent highest VCN and size.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 11ccc9107dc460de28af90fac1f42404d9802735 , < b0cc6dbc655e037251874b3e0dd1a760dcf29007 (git)
Affected: 11ccc9107dc460de28af90fac1f42404d9802735 , < 766062a82e1ce4087c7dc077224144dfd34b3661 (git)
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Linux Linux Affected: 7.1
Unaffected: 0 , < 7.1 (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs/runlist.c"
          ],
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          "vendor": "Linux",
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        }
      ],
      "metrics": [
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            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - fs/ntfs registers ntfs_export_ops, so nfsd/ksmbd VFS reads on an exported NTFS volume reach ntfs_map_runlist()-\u003entfs_mapping_pairs_decompress() for crafted on-disk mapping pairs without local shell access.\nAC:L - The attacker fully controls the empty mapping-pairs terminator, lowest/highest VCN, and allocated/data/initialized sizes; decompressing that attribute and merging the resulting degenerate runlist is deterministic with no race or victim-specific layout.\nPR:N - Triggering the decoder needs only permission to cause server-side parsing of mounted NTFS metadata (guest/anonymous SMB or a permissive NFS export, or an unprivileged open/read on an already-mounted volume), not init-namespace root or CAP_SYS_ADMIN at trigger time.\nUI:N - After the crafted volume is mounted and exported, ordinary remote or local reads decompress the invalid empty mapping pairs and enter the merge path; no extra victim mount dialog, USB insertion, or confirmation is required during the attack.\nS:U - Heap corruption of the in-memory runlist and subsequent misdirected cluster I/O remain in the host kernel security domain and do not cross a VM, container, or IOMMU boundary to another authority.\nC:H - Merging the degenerate unmapped runlist computes a negative source size and indexes src+ssize-1 / dst[marker] outside the allocation, an unbounded kernel heap out-of-bounds read that can disclose adjacent objects.\nI:H - The same merge performs out-of-bounds runlist writes via marker/loc arithmetic with ssize\u003c0 and later I/O using corrupted VCN/LCN mappings, a kernel heap write primitive sufficient for control-flow hijacking.\nA:H - WARN_ON on an entirely unmapped source runlist, heap out-of-bounds access, and corrupted runlist walks oops or panic the kernel, fully denying availability even when exploitation is not completed."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-13T06:31:51.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/b0cc6dbc655e037251874b3e0dd1a760dcf29007"
        },
        {
          "url": "https://git.kernel.org/stable/c/766062a82e1ce4087c7dc077224144dfd34b3661"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89613",
    "datePublished": "2026-09-11T19:45:14.081Z",
    "dateReserved": "2026-09-11T19:38:34.735Z",
    "dateUpdated": "2026-09-13T06:31:51.266Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T11:02:18+00:00",
      "cve": "CVE-2026-89613",
      "id": "CVE-2026-89613",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_not_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ntfs: reject invalid empty mapping pairs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89613.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "critical",
      "current_release_date": "2026-09-13T16:58:04Z",
      "cve": "CVE-2026-89613",
      "id": "CVE-2026-89613",
      "initial_release_date": "2026-09-12T16:25:04Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89613",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89613.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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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.


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