Vulnerability-Lookup

GHSA-QVH8-2FQM-584P

Vulnerability from github – Published: 2025-02-12 15:31 – Updated: 2025-11-03 21:32

Details

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

gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag: depending on that flag, the pages in the address space will either use buffer heads or iomap_folio_state structs, and we cannot mix the two.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21699"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-12T14:15:33Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Truncate address space when flipping GFS2_DIF_JDATA flag\n\nTruncate an inode\u0027s address space when flipping the GFS2_DIF_JDATA flag:\ndepending on that flag, the pages in the address space will either use\nbuffer heads or iomap_folio_state structs, and we cannot mix the two.",
  "id": "GHSA-qvh8-2fqm-584p",
  "modified": "2025-11-03T21:32:41Z",
  "published": "2025-02-12T15:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21699"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a40a140e11fec699e128170ccaa98b6b82cb503"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b0bd5051ad1c1e9ef4879f18e15a7712c974f3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4516febe325342555bb09ca5b396fb816d655821"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dd57d1f0e9844311c635a7fb39abce4f2ac5a61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e3ded34f3f3c9d7ed2aac7be8cf51153646574a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c9d9223802fbed4dee1ae301661bf346964c9d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c41abc11aa8438c9ed2d973f97e66674c0355df"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-21699 (GCVE-0-2025-21699)

Vulnerability from cvelistv5 – Published: 2025-02-12 13:52 – Updated: 2026-08-05 11:53

Title

gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

Summary

In the Linux kernel, the following vulnerability has been resolved: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag: depending on that flag, the pages in the address space will either use buffer heads or iomap_folio_state structs, and we cannot mix the two.

Severity

7.8 (High)


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

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:51 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/8c41abc11aa8438c9…
https://git.kernel.org/stable/c/4e3ded34f3f3c9d7e…
https://git.kernel.org/stable/c/2a40a140e11fec699…
https://git.kernel.org/stable/c/4dd57d1f0e9844311…
https://git.kernel.org/stable/c/4516febe325342555…
https://git.kernel.org/stable/c/5bb1fd0855bb0abc7…
https://git.kernel.org/stable/c/7c9d9223802fbed4d…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 8c41abc11aa8438c9ed2d973f97e66674c0355df (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 4e3ded34f3f3c9d7ed2aac7be8cf51153646574a (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 2a40a140e11fec699e128170ccaa98b6b82cb503 (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 4dd57d1f0e9844311c635a7fb39abce4f2ac5a61 (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 4516febe325342555bb09ca5b396fb816d655821 (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0 (git) Affected: 2164f9b9186962ffb7c687e18ec6f5255525f09d , < 7c9d9223802fbed4dee1ae301661bf346964c9d2 (git)
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.234 , ≤ 5.10.* (semver) Unaffected: 5.15.178 , ≤ 5.15.* (semver) Unaffected: 6.1.128 , ≤ 6.1.* (semver) Unaffected: 6.6.75 , ≤ 6.6.* (semver) Unaffected: 6.12.12 , ≤ 6.12.* (semver) Unaffected: 6.13.1 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21699",
                "options": [
                  {
                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:51:04.949443Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:57:09.197Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:59:23.304Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "Linux",
          "programFiles": [
            "fs/gfs2/file.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "lessThan": "8c41abc11aa8438c9ed2d973f97e66674c0355df",
              "status": "affected",
              "version": "2164f9b9186962ffb7c687e18ec6f5255525f09d",
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            {
              "lessThan": "4e3ded34f3f3c9d7ed2aac7be8cf51153646574a",
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            },
            {
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            {
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          "versions": [
            {
              "status": "affected",
              "version": "5.10"
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              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "5.10.234",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.75",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
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        }
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      "cpeApplicability": [
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                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.1.128",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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                {
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Truncate address space when flipping GFS2_DIF_JDATA flag\n\nTruncate an inode\u0027s address space when flipping the GFS2_DIF_JDATA flag:\ndepending on that flag, the pages in the address space will either use\nbuffer heads or iomap_folio_state structs, and we cannot mix the two."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "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 - The vulnerability is reached through the local ioctl(FS_IOC_SETFLAGS) syscall path (ioctl_setflags \u2192 vfs_fileattr_set \u2192 gfs2_fileattr_set \u2192 do_gfs2_set_flags) on a file residing on a mounted GFS2 filesystem. No network-facing code path processes attacker data here.\nAC:L - Exploitation is fully deterministic and single-threaded: populate the page cache by writing to a file, flip GFS2_DIF_JDATA with chattr, then touch/truncate/fadvise the file to drive the mismatched aops over the stale folio-\u003eprivate. There is no race to win and no memory-layout precondition outside the attacker\u0027s control.\nPR:L - The only access control on the path is inode_owner_or_capable(), so any unprivileged local user who owns a file on the GFS2 mount can flip the flag; fileattr_set_prepare() restricts only APPEND/IMMUTABLE and project IDs, not FS_JOURNAL_DATA_FL. GFS2 is deployed as admin-mounted shared cluster/HPC storage where ordinary users routinely own files.\nUI:N - The attacker performs every step themselves (create file, write, chattr, re-access) with no action by any other user. The GFS2 filesystem is already mounted as part of normal operation in the target deployment.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed. This is a standard local kernel privilege-escalation scope.\nC:H - The type confusion yields out-of-bounds reads past the ~24-byte iomap_folio_state (b_size/b_data/b_end_io read from adjacent slab objects) and leaks buffer_head pointer contents through ifs-\u003estate bitmap reads, plus a use-after-free on buffer_head that gives the attacker control of freed-object contents and thus an arbitrary-read primitive.\nI:H - ifs_free() calls kfree() on a live buffer_head still linked into the bh ring, bh_lru and b_assoc_buffers lists, producing a UAF with list-unlink write primitives; bitmap_set()/atomic_add() write directly into b_folio/b_blocknr/b_this_page, and in the opposite direction an OOB-read b_data is used as a memcpy destination for user-controlled data while b_end_io is called as a function pointer.\nA:H - spin_lock_irqsave() on ifs-\u003estate_lock aliased onto a non-zero bh-\u003eb_state spins forever with interrupts disabled, causing a hard lockup, and the corrupted b_this_page/b_folio pointers plus the buffer_head UAF reliably produce oopses and panics."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:53:41.986Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21699",
    "datePublished": "2025-02-12T13:52:50.962Z",
    "dateReserved": "2024-12-29T08:45:45.748Z",
    "dateUpdated": "2026-08-05T11:53:41.986Z",
    "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-QVH8-2FQM-584P

CVE-2025-21699 (GCVE-0-2025-21699)

Tags

Sightings

Nomenclature

Related by attack behaviour