Vulnerability-Lookup

GHSA-MP4C-25VM-9W6P

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31

Details

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

ext4: xattr: fix null pointer deref in ext4_raw_inode()

If ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED), iloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all() lacks error checking, this will lead to a null pointer dereference in ext4_raw_inode(), called right after ext4_get_inode_loc().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68820"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:04Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: xattr: fix null pointer deref in ext4_raw_inode()\n\nIf ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED),\niloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all()\nlacks error checking, this will lead to a null pointer dereference\nin ext4_raw_inode(), called right after ext4_get_inode_loc().\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.",
  "id": "GHSA-mp4c-25vm-9w6p",
  "modified": "2026-01-13T18:31:05Z",
  "published": "2026-01-13T18:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68820"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/190ad0f22ba49f1101182b80e3af50ca2ddfe72f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b154e901fda2e98570b8f426a481f5740097dc2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5d942922182e82724b7152cb998f540132885ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b97cb7d6a051aa6ebd57906df0e26e9e36c26d14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce5f54c065a4a7cbb92787f4f140917112350142"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-68820 (GCVE-0-2025-68820)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-01-13 15:29

Title

ext4: xattr: fix null pointer deref in ext4_raw_inode()

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: xattr: fix null pointer deref in ext4_raw_inode() If ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED), iloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all() lacks error checking, this will lead to a null pointer dereference in ext4_raw_inode(), called right after ext4_get_inode_loc(). Found by Linux Verification Center (linuxtesting.org) with SVACE.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/190ad0f22ba49f110…
	https://git.kernel.org/stable/c/b5d942922182e8272…
	https://git.kernel.org/stable/c/5b154e901fda2e985…
	https://git.kernel.org/stable/c/ce5f54c065a4a7cbb…
	https://git.kernel.org/stable/c/b97cb7d6a051aa6eb…

Impacted products

Vendor

Product

Version

Linux

Affected: cf9291a3449b04688b81e32621e88de8f4314b54 , < 190ad0f22ba49f1101182b80e3af50ca2ddfe72f (git)
Affected: 362a90cecd36e8a5c415966d0b75b04a0270e4dd , < b5d942922182e82724b7152cb998f540132885ec (git)
Affected: eb59cc31b6ea076021d14b04e7faab1636b87d0e , < 5b154e901fda2e98570b8f426a481f5740097dc2 (git)
Affected: c8e008b60492cf6fd31ef127aea6d02fd3d314cd , < ce5f54c065a4a7cbb92787f4f140917112350142 (git)
Affected: c8e008b60492cf6fd31ef127aea6d02fd3d314cd , < b97cb7d6a051aa6ebd57906df0e26e9e36c26d14 (git)
Affected: 6aff941cb0f7d0c897c3698ad2e30672709135e3 (git)
Affected: 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 (git)
Affected: f737418b6de31c962c7192777ee4018906975383 (git)
Affected: 3bc6317033f365ce578eb6039445fb66162722fd (git)
Affected: 836e625b03a666cf93ff5be328c8cb30336db872 (git)

Linux

Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/xattr.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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              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
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            {
              "status": "affected",
              "version": "6aff941cb0f7d0c897c3698ad2e30672709135e3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3",
              "versionType": "git"
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              "versionType": "git"
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            {
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              "version": "3bc6317033f365ce578eb6039445fb66162722fd",
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            {
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              "versionType": "git"
            }
          ]
        },
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          "defaultStatus": "affected",
          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
                  "versionStartIncluding": "6.1.135",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.120",
                  "versionStartIncluding": "6.6.88",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "6.12.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.293",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.237",
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                },
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              "operator": "OR"
            }
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        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: xattr: fix null pointer deref in ext4_raw_inode()\n\nIf ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED),\niloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all()\nlacks error checking, this will lead to a null pointer dereference\nin ext4_raw_inode(), called right after ext4_get_inode_loc().\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:29:23.351Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/190ad0f22ba49f1101182b80e3af50ca2ddfe72f"
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        {
          "url": "https://git.kernel.org/stable/c/b97cb7d6a051aa6ebd57906df0e26e9e36c26d14"
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      }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68820",
    "datePublished": "2026-01-13T15:29:23.351Z",
    "dateReserved": "2025-12-24T10:30:51.048Z",
    "dateUpdated": "2026-01-13T15:29:23.351Z",
    "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-MP4C-25VM-9W6P

CVE-2025-68820 (GCVE-0-2025-68820)

Tags

Sightings

Nomenclature