Vulnerability-Lookup

GHSA-MGCW-5H4F-3529

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

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

ext4: reject mount if bigalloc with s_first_data_block != 0

bigalloc with s_first_data_block != 0 is not supported, reject mounting it.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31447"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: reject mount if bigalloc with s_first_data_block != 0\n\nbigalloc with s_first_data_block != 0 is not supported, reject mounting\nit.",
  "id": "GHSA-mgcw-5h4f-3529",
  "modified": "2026-04-22T15:31:41Z",
  "published": "2026-04-22T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31447"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31447 (GCVE-0-2026-31447)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:53 – Updated: 2026-04-23 15:18

Title

ext4: reject mount if bigalloc with s_first_data_block != 0

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: reject mount if bigalloc with s_first_data_block != 0 bigalloc with s_first_data_block != 0 is not supported, reject mounting it.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/5ad6d994255e27a32…
	https://git.kernel.org/stable/c/3a926957cc95899ef…
	https://git.kernel.org/stable/c/7b58c110b4e1f028e…
	https://git.kernel.org/stable/c/b77de3fceafbb39f3…
	https://git.kernel.org/stable/c/d787d3ae96648dc14…
	https://git.kernel.org/stable/c/ad1f6d608f33f59d2…
	https://git.kernel.org/stable/c/7d5b04290156c3fc3…
	https://git.kernel.org/stable/c/3822743dc20386d98…

Impacted products

Vendor

Product

Version

Linux

Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < 5ad6d994255e27a3254079dfb50ca861fc31f2d0 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < 3a926957cc95899ef88529710836edadc03c71a1 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < 7b58c110b4e1f028eb38eec9ed3555e9be81c8b0 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < b77de3fceafbb39f30e4ff5dc986f863d5456417 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < d787d3ae96648dc14a3b7ca8fde817177e82c1c7 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < ad1f6d608f33f59d21a3d025615d6786a6443998 (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < 7d5b04290156c3fc316eecc86a4f9d201ab7d44a (git)
Affected: 281b59959707dfae03ce038cdf231bf4904e170c , < 3822743dc20386d9897e999dbb990befa3a5b3f8 (git)

Linux

Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "fs/ext4/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.253",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.168",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: reject mount if bigalloc with s_first_data_block != 0\n\nbigalloc with s_first_data_block != 0 is not supported, reject mounting\nit."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-23T15:18:24.855Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0"
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        {
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          "url": "https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0"
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        {
          "url": "https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a"
        },
        {
          "url": "https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31447",
    "datePublished": "2026-04-22T13:53:43.467Z",
    "dateReserved": "2026-03-09T15:48:24.091Z",
    "dateUpdated": "2026-04-23T15:18:24.855Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-MGCW-5H4F-3529

CVE-2026-31447 (GCVE-0-2026-31447)

Tags

Sightings

Nomenclature