Vulnerability-Lookup

GHSA-HQQ4-5743-J5RQ

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:

fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow

indx_find_buffer() recursively descends the B+ tree index with no depth limit. A crafted NTFS image with circular index node references causes unbounded recursion, overflowing the kernel stack and panicking the system.

This is reachable by mounting a malicious NTFS filesystem (e.g. from a USB drive via desktop automount) and deleting a file whose index entry triggers the rebalancing fallback path in indx_delete_entry().

Add a depth parameter and bail out with -EINVAL when it reaches the fnd->nodes array bound, matching the constraint already enforced by fnd_push() in indx_find().

The related function indx_find() was previously patched for a similar infinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was missed.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72194"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:37Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow\n\nindx_find_buffer() recursively descends the B+ tree index with no depth\nlimit.  A crafted NTFS image with circular index node references causes\nunbounded recursion, overflowing the kernel stack and panicking the\nsystem.\n\nThis is reachable by mounting a malicious NTFS filesystem (e.g. from a\nUSB drive via desktop automount) and deleting a file whose index entry\ntriggers the rebalancing fallback path in indx_delete_entry().\n\nAdd a depth parameter and bail out with -EINVAL when it reaches the\nfnd-\u003enodes array bound, matching the constraint already enforced by\nfnd_push() in indx_find().\n\nThe related function indx_find() was previously patched for a similar\ninfinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was\nmissed.",
  "id": "GHSA-hqq4-5743-j5rq",
  "modified": "2026-08-17T06:33:15Z",
  "published": "2026-08-15T06:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65357a81f64cb3fbe13b4b937586755e4b3a072f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78612f478f9fadcec4f9b3b089970da67ffb47e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/908c9243ba309997b73cbda3e4c563d0fb345ee9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99031d4f63c785d2a985b6a4c64c4256f7117052"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdf50c788e0991e42a187ff75479a0df7fb752f1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72194 (GCVE-0-2026-72194)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:41

Title

fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow

Summary

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow indx_find_buffer() recursively descends the B+ tree index with no depth limit. A crafted NTFS image with circular index node references causes unbounded recursion, overflowing the kernel stack and panicking the system. This is reachable by mounting a malicious NTFS filesystem (e.g. from a USB drive via desktop automount) and deleting a file whose index entry triggers the rebalancing fallback path in indx_delete_entry(). Add a depth parameter and bail out with -EINVAL when it reaches the fnd->nodes array bound, matching the constraint already enforced by fnd_push() in indx_find(). The related function indx_find() was previously patched for a similar infinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was missed.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/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/99031d4f63c785d2a…
https://git.kernel.org/stable/c/65357a81f64cb3fbe…
https://git.kernel.org/stable/c/96fb64f9da86fd2db…
https://git.kernel.org/stable/c/78612f478f9fadcec…
https://git.kernel.org/stable/c/908c9243ba309997b…
https://git.kernel.org/stable/c/fdf50c788e0991e42…
https://git.kernel.org/stable/c/1ebd684b8f627f75b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 99031d4f63c785d2a985b6a4c64c4256f7117052 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 65357a81f64cb3fbe13b4b937586755e4b3a072f (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 78612f478f9fadcec4f9b3b089970da67ffb47e9 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 908c9243ba309997b73cbda3e4c563d0fb345ee9 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < fdf50c788e0991e42a187ff75479a0df7fb752f1 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd (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/index.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "99031d4f63c785d2a985b6a4c64c4256f7117052",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            },
            {
              "lessThan": "65357a81f64cb3fbe13b4b937586755e4b3a072f",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            },
            {
              "lessThan": "96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            },
            {
              "lessThan": "78612f478f9fadcec4f9b3b089970da67ffb47e9",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            },
            {
              "lessThan": "908c9243ba309997b73cbda3e4c563d0fb345ee9",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "fdf50c788e0991e42a187ff75479a0df7fb752f1",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            },
            {
              "lessThan": "1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd",
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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            "fs/ntfs3/index.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
                },
                {
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                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
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                  "vulnerable": true
                }
              ],
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow\n\nindx_find_buffer() recursively descends the B+ tree index with no depth\nlimit.  A crafted NTFS image with circular index node references causes\nunbounded recursion, overflowing the kernel stack and panicking the\nsystem.\n\nThis is reachable by mounting a malicious NTFS filesystem (e.g. from a\nUSB drive via desktop automount) and deleting a file whose index entry\ntriggers the rebalancing fallback path in indx_delete_entry().\n\nAdd a depth parameter and bail out with -EINVAL when it reaches the\nfnd-\u003enodes array bound, matching the constraint already enforced by\nfnd_push() in indx_find().\n\nThe related function indx_find() was previously patched for a similar\ninfinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was\nmissed."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "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 - ntfs3 registers export_operations; on NAS/hybrid servers exporting an NTFS volume via nfsd or ksmbd, a remote client\u0027s unlink reaches vfs_unlink\u2192ntfs_unlink_inode\u2192ni_remove_name\u2192indx_delete_entry\u2192indx_find_buffer without any local syscall from the attacker.\nAC:L - The attacker fully controls on-disk INDEX_ENTRY VCN pointers and can craft circular B+ tree references so indx_find_buffer() recurses deterministically until stack exhaustion; no race, special heap layout, or other uncontrollable condition is required beyond presenting the image and issuing unlink.\nPR:N - Exploitation requires only supplying a malicious NTFS image later mounted by root/udisks2/automount, or write permission on an NFS/SMB-exported NTFS share (including guest/anonymous write); no init-namespace root, CAP_SYS_ADMIN, or other elevated host credentials are needed on the trigger path.\nUI:N - Once an administrator has mounted and optionally exported the NTFS volume\u2014or desktop/kiosk automount has attached removable media\u2014the attacker issues unlink directly; no further victim clicks, file opens, or cooperative actions beyond that standing configuration are required.\nS:U - Impact is kernel stack overflow and panic within the host kernel\u0027s security authority; this is standard local or network filesystem exploitation, not a VM escape, IOMMU bypass, or cross-scope sandbox breakout.\nC:H - Unbounded recursion overflows the kernel stack, corrupting stack memory before the guard-page fault; under overestimation guidance, kernel stack corruption is treated as potentially enabling arbitrary kernel memory disclosure or information leakage via control-data overwrite.\nI:H - Recursive stack exhaustion corrupts return addresses and adjacent stack frames on the kernel stack, plausibly enabling control-flow hijack or arbitrary kernel modification even though the immediate failure mode is a panic.\nA:H - The fix commit and call path confirm unbounded recursion overflows the kernel stack and panics the system; any kernel oops, stack guard fault, or panic from this path scores Availability High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:41:20.799Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/99031d4f63c785d2a985b6a4c64c4256f7117052"
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        {
          "url": "https://git.kernel.org/stable/c/65357a81f64cb3fbe13b4b937586755e4b3a072f"
        },
        {
          "url": "https://git.kernel.org/stable/c/96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34"
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        },
        {
          "url": "https://git.kernel.org/stable/c/fdf50c788e0991e42a187ff75479a0df7fb752f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd"
        }
      ],
      "title": "fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72194",
    "datePublished": "2026-08-15T05:53:54.125Z",
    "dateReserved": "2026-08-09T03:40:39.911Z",
    "dateUpdated": "2026-08-17T05:41:20.799Z",
    "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-HQQ4-5743-J5RQ

CVE-2026-72194 (GCVE-0-2026-72194)

Tags

Sightings

Nomenclature