github - ghsa-86g8-833h-3hcm

ghsa-86g8-833h-3hcm

Vulnerability from github

Published

2024-07-12 15:31

Modified

2024-08-06 15:30

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

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

ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()

bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. Since ocfs2 hasn't set bh->b_assoc_map, it will trigger NULL pointer dereference when calling into ocfs2_abort_trigger().

Actually this was pointed out in history, see commit 74e364ad1b13. But I've made a mistake when reviewing commit 8887b94d9322 and then re-introduce this regression.

Since we cannot revive bdev in buffer head, so fix this issue by initializing all types of ocfs2 triggers when fill super, and then get the specific ocfs2 trigger from ocfs2_caching_info when access journal.

[joseph.qi@linux.alibaba.com: v2] Link: https://lkml.kernel.org/r/20240602112045.1112708-1-joseph.qi@linux.alibaba.com

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40951"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()\n\nbdev-\u003ebd_super has been removed and commit 8887b94d9322 change the usage\nfrom bdev-\u003ebd_super to b_assoc_map-\u003ehost-\u003ei_sb.  Since ocfs2 hasn\u0027t set\nbh-\u003eb_assoc_map, it will trigger NULL pointer dereference when calling\ninto ocfs2_abort_trigger().\n\nActually this was pointed out in history, see commit 74e364ad1b13.  But\nI\u0027ve made a mistake when reviewing commit 8887b94d9322 and then\nre-introduce this regression.\n\nSince we cannot revive bdev in buffer head, so fix this issue by\ninitializing all types of ocfs2 triggers when fill super, and then get the\nspecific ocfs2 trigger from ocfs2_caching_info when access journal.\n\n[joseph.qi@linux.alibaba.com: v2]\n  Link: https://lkml.kernel.org/r/20240602112045.1112708-1-joseph.qi@linux.alibaba.com",
  "id": "GHSA-86g8-833h-3hcm",
  "modified": "2024-08-06T15:30:48Z",
  "published": "2024-07-12T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40951"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734ce"
    },
    {
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      "type": "CVSS_V3"
    }
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}

cve-2024-40951

Vulnerability from cvelistv5

Published

2024-07-12 12:31

Modified

2024-11-05 09:33

Severity ?

Summary

ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734ce
	https://git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1a
	https://git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095f

Impacted products

Vendor

Product

Version

▼

Linux

Version: 8887b94d9322
Version: 8887b94d9322
Version: 8887b94d9322

Linux

Version: 6.6

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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