CVE-2025-71292 (GCVE-0-2025-71292)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:32 – Updated: 2026-05-07 17:13
VLAI?
Title
jfs: nlink overflow in jfs_rename
Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: nlink overflow in jfs_rename If nlink is maximal for a directory (-1) and inside that directory you perform a rename for some child directory (not moving from the parent), then the nlink of the first directory is first incremented and later decremented. Normally this is fine, but when nlink = -1 this causes a wrap around to 0, and then drop_nlink issues a warning. After applying the patch syzbot no longer issues any warnings. I also ran some basic fs tests to look for any regressions.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2108829a59f081e822fdab8c2cd7131deb8aa8a1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a3d66089e50a6e0142f8884471f74292102ea9aa (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f70fcbc2ac7c24f087a2c895c5753aa730b1e479 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5d77c36cd4b698649f5c30c5f6c084f4f61d1880 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fe136426e30ca6debcf916fd6a141555ed9fde74 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 93c325746ae59709b4f9bad4e3e4761c8d566c70 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9218dc26fd922b09858ecd3666ed57dfd8098da8 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "fs/jfs/namei.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.12"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
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            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: nlink overflow in jfs_rename\n\nIf nlink is maximal for a directory (-1) and inside that directory you\nperform a rename for some child directory (not moving from the parent),\nthen the nlink of the first directory is first incremented and later\ndecremented. Normally this is fine, but when nlink = -1 this causes a\nwrap around to 0, and then drop_nlink issues a warning.\n\nAfter applying the patch syzbot no longer issues any warnings. I also\nran some basic fs tests to look for any regressions."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T17:13:51.314Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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      "title": "jfs: nlink overflow in jfs_rename",
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    "datePublished": "2026-05-06T11:32:23.897Z",
    "dateReserved": "2026-05-06T11:31:45.509Z",
    "dateUpdated": "2026-05-07T17:13:51.314Z",
    "state": "PUBLISHED"
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      "date": "2026-05-10",
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  }
}


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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

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.