CVE-2024-26878 (GCVE-0-2024-26878)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2026-05-12 11:49
VLAI?
Title
quota: Fix potential NULL pointer dereference
Summary
In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 8514899c1a4edf802f03c408db901063aa3f05a1 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 49669f8e7eb053f91d239df7b1bfb4500255a9d0 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 7f9e833fc0f9b47be503af012eb5903086939754 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < f2649d98aa9ca8623149b3cb8df00c944f5655c7 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < 6afc9f4434fa8063aa768c2bf5bf98583aee0877 (git)
Affected: 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac , < d0aa72604fbd80c8aabb46eda00535ed35570f1f (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 4.19.311 , ≤ 4.19.* (semver)
Unaffected: 5.4.273 , ≤ 5.4.* (semver)
Unaffected: 5.10.214 , ≤ 5.10.* (semver)
Unaffected: 5.15.153 , ≤ 5.15.* (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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      "id": "CVE-2024-26878",
      "lastModified": "2025-01-14T14:49:44.283",
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\"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-398330.html\"}, {\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-05-12T11:49:56.835Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26878\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:48:25.754517Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:16.636Z\"}}], \"cna\": {\"title\": \"quota: Fix potential NULL pointer 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\"version\": \"6.8.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/quota/dquot.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1\"}, {\"url\": \"https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0\"}, {\"url\": \"https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0\"}, {\"url\": \"https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25\"}, {\"url\": \"https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754\"}, {\"url\": \"https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5\"}, {\"url\": \"https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7\"}, {\"url\": \"https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877\"}, {\"url\": \"https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nquota: Fix potential NULL pointer dereference\\n\\nBelow race may cause NULL pointer dereference\\n\\nP1\\t\\t\\t\\t\\tP2\\ndquot_free_inode\\t\\t\\tquota_off\\n\\t\\t\\t\\t\\t  drop_dquot_ref\\n\\t\\t\\t\\t\\t   remove_dquot_ref\\n\\t\\t\\t\\t\\t   dquots = i_dquot(inode)\\n  dquots = i_dquot(inode)\\n  srcu_read_lock\\n  dquots[cnt]) != NULL (1)\\n\\t\\t\\t\\t\\t     dquots[type] = NULL (2)\\n  spin_lock(\u0026dquots[cnt]-\u003edq_dqb_lock) (3)\\n   ....\\n\\nIf dquot_free_inode(or other routines) checks inode\u0027s quota pointers (1)\\nbefore quota_off sets it to NULL(2) and use it (3) after that, NULL pointer\\ndereference will be triggered.\\n\\nSo let\u0027s fix it by using a temporary pointer to avoid this issue.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.311\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.273\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.214\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.153\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.83\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": 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      "cveMetadata": "{\"cveId\": \"CVE-2024-26878\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-12T11:49:56.835Z\", \"dateReserved\": \"2024-02-19T14:20:24.185Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:35.838Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




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.