Vulnerability-Lookup

GHSA-3H3P-2268-63W8

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

In the Linux kernel, the following vulnerability has been resolved:

ntfs3: fix out-of-bounds read in decompress_lznt

decompress_lznt() does not validate array index bounds before accessing the decompression table. A corrupted NTFS3 image with invalid compressed data can trigger an out-of-bounds read.

Add index bounds checking to prevent the OOB access.

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-2026-80598"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:43Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in decompress_lznt\n\ndecompress_lznt() does not validate array index bounds before accessing\nthe decompression table. A corrupted NTFS3 image with invalid compressed\ndata can trigger an out-of-bounds read.\n\nAdd index bounds checking to prevent the OOB access.",
  "id": "GHSA-3h3p-2268-63w8",
  "modified": "2026-08-29T09:30:25Z",
  "published": "2026-08-28T09:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80598"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1113fa5b01a47a1a4cdbb9c695197ca6215f02a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61415ffa365d2eca6986914afd0d1412444aa1dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7160a57192fb16d7a6fa9b7f5c7ac341d2444a89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a93980141253c932aa6ae5d4422d90e0162dc774"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd77afca2ae9b6d44d37902e3ad672ebb028b070"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c694f8ea2611e7413b3f04ee47e04a9b7b45817b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff05a98150ebb2b03919a9c05c576681e86abbb7"
    }
  ],
  "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-2026-80598 (GCVE-0-2026-80598)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-30 07:08

Title

ntfs3: fix out-of-bounds read in decompress_lznt

Summary

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix out-of-bounds read in decompress_lznt decompress_lznt() does not validate array index bounds before accessing the decompression table. A corrupted NTFS3 image with invalid compressed data can trigger an out-of-bounds read. Add index bounds checking to prevent the OOB access.

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 mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/1113fa5b01a47a1a4…
https://git.kernel.org/stable/c/61415ffa365d2eca6…
https://git.kernel.org/stable/c/bd77afca2ae9b6d44…
https://git.kernel.org/stable/c/c694f8ea2611e7413…
https://git.kernel.org/stable/c/ff05a98150ebb2b03…
https://git.kernel.org/stable/c/a93980141253c932a…
https://git.kernel.org/stable/c/7160a57192fb16d7a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < 1113fa5b01a47a1a4cdbb9c695197ca6215f02a8 (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < 61415ffa365d2eca6986914afd0d1412444aa1dd (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < bd77afca2ae9b6d44d37902e3ad672ebb028b070 (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < c694f8ea2611e7413b3f04ee47e04a9b7b45817b (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < ff05a98150ebb2b03919a9c05c576681e86abbb7 (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < a93980141253c932aa6ae5d4422d90e0162dc774 (git) Affected: 522e010b58379fbe19b38fdef5016bca0c3cf405 , < 7160a57192fb16d7a6fa9b7f5c7ac341d2444a89 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/lznt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1113fa5b01a47a1a4cdbb9c695197ca6215f02a8",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
              "lessThan": "61415ffa365d2eca6986914afd0d1412444aa1dd",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
              "lessThan": "bd77afca2ae9b6d44d37902e3ad672ebb028b070",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
              "lessThan": "c694f8ea2611e7413b3f04ee47e04a9b7b45817b",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
              "lessThan": "a93980141253c932aa6ae5d4422d90e0162dc774",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            },
            {
              "lessThan": "7160a57192fb16d7a6fa9b7f5c7ac341d2444a89",
              "status": "affected",
              "version": "522e010b58379fbe19b38fdef5016bca0c3cf405",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/lznt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "5.15",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.15",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.15",
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                }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in decompress_lznt\n\ndecompress_lznt() does not validate array index bounds before accessing\nthe decompression table. A corrupted NTFS3 image with invalid compressed\ndata can trigger an out-of-bounds read.\n\nAdd index bounds checking to prevent the OOB access."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - decompress_lznt() is reached only when the kernel reads LZNT-compressed NTFS file data through local VFS paths (read/mmap/write on compressed files) after an ntfs3 mount; it is not invoked from network protocol parsers such as nfsd, ksmbd, or the TCP/IP stack.\nAC:L - Attacker fully controls the on-disk LZNT compressed stream in a crafted file/image and can reliably drive the index past s_max_off[] bounds to trigger the out-of-bounds read; syzbot/syzkaller reproduced this without races or attacker-uncontrollable memory layout.\nPR:L - Triggering decompression requires only read access to a compressed file via open/read/mmap, or mounting a malicious NTFS image which needs CAP_SYS_ADMIN obtainable by unprivileged users inside user+mount namespaces on typical Linux systems.\nUI:N - No separate victim action is required when the attacker has local access: they can mount a crafted NTFS image in a user namespace and read the malicious compressed file themselves to reach decompress_lznt() without anyone else interacting with the system.\nS:U - The flaw corrupts or discloses kernel memory during NTFS LZNT decompression within the same kernel security domain; it does not cross VM, container, or IOMMU boundaries and is not a sandbox or hypervisor escape.\nC:H - The bug performs out-of-bounds reads of kernel memory past the nine-element s_max_off[] table in .rodata, and attacker-controlled index values feed parse_pair() and decompression output, enabling disclosure of sensitive kernel data into page-cache buffers returned to userspace.\nI:H - Unbounded index growth from malformed LZNT input passes attacker-influenced shift widths into parse_pair(), producing malformed backreference offset/length pairs that drive the LZ copy loop and can corrupt kernel page-cache memory in ways chainable toward arbitrary write primitives.\nA:H - Out-of-bounds access to s_max_off[] is a kernel memory safety violation that KASAN/KFENCE report and can oops or panic the kernel; repeated reads of a malicious compressed file can reliably deny service to the reading process or the entire system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-30T07:08:34.000Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/61415ffa365d2eca6986914afd0d1412444aa1dd"
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          "url": "https://git.kernel.org/stable/c/bd77afca2ae9b6d44d37902e3ad672ebb028b070"
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        {
          "url": "https://git.kernel.org/stable/c/c694f8ea2611e7413b3f04ee47e04a9b7b45817b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff05a98150ebb2b03919a9c05c576681e86abbb7"
        },
        {
          "url": "https://git.kernel.org/stable/c/a93980141253c932aa6ae5d4422d90e0162dc774"
        },
        {
          "url": "https://git.kernel.org/stable/c/7160a57192fb16d7a6fa9b7f5c7ac341d2444a89"
        }
      ],
      "title": "ntfs3: fix out-of-bounds read in decompress_lznt",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80598",
    "datePublished": "2026-08-28T06:48:24.097Z",
    "dateReserved": "2026-08-26T14:34:25.771Z",
    "dateUpdated": "2026-08-30T07:08:34.000Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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-3H3P-2268-63W8

CVE-2026-80598 (GCVE-0-2026-80598)

Tags

Sightings

Nomenclature