Vulnerability-Lookup

GHSA-9W55-R5PP-5HFX

Vulnerability from github – Published: 2025-12-16 18:31 – Updated: 2026-07-30 06:32

Details

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

f2fs: fix to detect potential corrupted nid in free_nid_list

As reported, on-disk footer.ino and footer.nid is the same and out-of-range, let's add sanity check on f2fs_alloc_nid() to detect any potential corruption in free_nid_list.

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-2025-68315"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-16T16:16:11Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to detect potential corrupted nid in free_nid_list\n\nAs reported, on-disk footer.ino and footer.nid is the same and\nout-of-range, let\u0027s add sanity check on f2fs_alloc_nid() to detect\nany potential corruption in free_nid_list.",
  "id": "GHSA-9w55-r5pp-5hfx",
  "modified": "2026-07-30T06:32:25Z",
  "published": "2025-12-16T18:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68315"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88b2ddb0c4f1dc874d4598e78cc830c64315ed86"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fc6056dcf79937c46c97fa4996cda65956437a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9337ed5e777e1c19854928cba7a8131dd00e611b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adbcb34f03abb89e681a5907c4c3ce4bf224991d"
    }
  ],
  "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-2025-68315 (GCVE-0-2025-68315)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:39 – Updated: 2026-08-05 12:10

Title

f2fs: fix to detect potential corrupted nid in free_nid_list

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to detect potential corrupted nid in free_nid_list As reported, on-disk footer.ino and footer.nid is the same and out-of-range, let's add sanity check on f2fs_alloc_nid() to detect any potential corruption in free_nid_list.

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

5 references

URL	Tags
https://git.kernel.org/stable/c/88b2ddb0c4f1dc874…
https://git.kernel.org/stable/c/9337ed5e777e1c198…
https://git.kernel.org/stable/c/6b9525596a83cd5b7…
https://git.kernel.org/stable/c/adbcb34f03abb89e6…
https://git.kernel.org/stable/c/8fc6056dcf79937c4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 88b2ddb0c4f1dc874d4598e78cc830c64315ed86 (git) Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 9337ed5e777e1c19854928cba7a8131dd00e611b (git) Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa (git) Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < adbcb34f03abb89e681a5907c4c3ce4bf224991d (git) Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 8fc6056dcf79937c46c97fa4996cda65956437a9 (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.58 , ≤ 6.12.* (semver) Unaffected: 6.17.8 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/node.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "88b2ddb0c4f1dc874d4598e78cc830c64315ed86",
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "versionType": "git"
            },
            {
              "lessThan": "9337ed5e777e1c19854928cba7a8131dd00e611b",
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "versionType": "git"
            },
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              "lessThan": "6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa",
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "versionType": "git"
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            {
              "lessThan": "adbcb34f03abb89e681a5907c4c3ce4bf224991d",
              "status": "affected",
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              "versionType": "git"
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            {
              "lessThan": "8fc6056dcf79937c46c97fa4996cda65956437a9",
              "status": "affected",
              "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/node.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to detect potential corrupted nid in free_nid_list\n\nAs reported, on-disk footer.ino and footer.nid is the same and\nout-of-range, let\u0027s add sanity check on f2fs_alloc_nid() to detect\nany potential corruption in free_nid_list."
        }
      ],
      "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 - F2FS supports NFS exports, and a network NFS CREATE request reaches nfsd3_proc_create(), vfs_create(), f2fs_create(), f2fs_new_inode(), and f2fs_alloc_nid(). A writable F2FS-backed NFS server is a reasonable network-facing deployment.\nAC:L - Once an invalid NID is present, allocation deterministically consumes it from the list head; repeated CREATE requests require no race or timing conditions. Older affected kernels also lacked producer-side range validation, allowing corrupted metadata to seed the list directly.\nPR:N - A writable NFS export accepting AUTH_NULL or unauthenticated AUTH_SYS requests permits CREATE without verified credentials. The allocation path itself performs no capability check.\nUI:N - The attacker can trigger allocation directly with network filesystem operations; no victim action is required during exploitation.\nS:U - The vulnerable filesystem code and the affected kernel memory, execution, and storage resources share the same kernel security authority.\nC:H - The invalid NID causes out-of-bounds bitmap and pointer-array reads, and the resulting kernel memory corruption can plausibly be leveraged to disclose arbitrary kernel memory.\nI:H - The unchecked index can drive an out-of-bounds bit clear and counter decrement through free_nid_bitmap and free_nid_count, while also committing invalid node and NAT metadata. These writes can plausibly enable control-flow compromise and persistent filesystem corruption.\nA:H - The out-of-bounds accesses can crash or hang the kernel, while invalid node metadata can force checkpoint failure or persistent filesystem unavailability. Network requests can trigger the condition repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:10:49.846Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/88b2ddb0c4f1dc874d4598e78cc830c64315ed86"
        },
        {
          "url": "https://git.kernel.org/stable/c/9337ed5e777e1c19854928cba7a8131dd00e611b"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/adbcb34f03abb89e681a5907c4c3ce4bf224991d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fc6056dcf79937c46c97fa4996cda65956437a9"
        }
      ],
      "title": "f2fs: fix to detect potential corrupted nid in free_nid_list",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68315",
    "datePublished": "2025-12-16T15:39:45.716Z",
    "dateReserved": "2025-12-16T14:48:05.295Z",
    "dateUpdated": "2026-08-05T12:10:49.846Z",
    "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.

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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-9W55-R5PP-5HFX

CVE-2025-68315 (GCVE-0-2025-68315)

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