Vulnerability-Lookup

GHSA-269X-4F35-GF3H

Vulnerability from github – Published: 2024-08-17 09:30 – Updated: 2025-11-03 21:31

Details

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

exfat: fix potential deadlock on __exfat_get_dentry_set

When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array is allocated in __exfat_get_entry_set. The problem is that the bh-array is allocated with GFP_KERNEL. It does not make sense. In the following cases, a deadlock for sbi->s_lock between the two processes may occur.

   CPU0                CPU1
   ----                ----

kswapd balance_pgdat lock(fs_reclaim) exfat_iterate lock(&sbi->s_lock) exfat_readdir exfat_get_uniname_from_ext_entry exfat_get_dentry_set __exfat_get_dentry_set kmalloc_array ... lock(fs_reclaim) ... evict exfat_evict_inode lock(&sbi->s_lock)

To fix this, let's allocate bh-array with GFP_NOFS.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-42315"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-17T09:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix potential deadlock on __exfat_get_dentry_set\n\nWhen accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array\nis allocated in __exfat_get_entry_set. The problem is that the bh-array is\nallocated with GFP_KERNEL. It does not make sense. In the following cases,\na deadlock for sbi-\u003es_lock between the two processes may occur.\n\n       CPU0                CPU1\n       ----                ----\n  kswapd\n   balance_pgdat\n    lock(fs_reclaim)\n                      exfat_iterate\n                       lock(\u0026sbi-\u003es_lock)\n                       exfat_readdir\n                        exfat_get_uniname_from_ext_entry\n                         exfat_get_dentry_set\n                          __exfat_get_dentry_set\n                           kmalloc_array\n                            ...\n                            lock(fs_reclaim)\n    ...\n    evict\n     exfat_evict_inode\n      lock(\u0026sbi-\u003es_lock)\n\nTo fix this, let\u0027s allocate bh-array with GFP_NOFS.",
  "id": "GHSA-269x-4f35-gf3h",
  "modified": "2025-11-03T21:31:11Z",
  "published": "2024-08-17T09:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42315"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d1970493c289e3f44b9ec847ed26a5dbdf56a62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89fc548767a2155231128cb98726d6d2ea1256c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7ac198f8dba791e3144c4da48a5a9b95773ee4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c052f775ee6ccacd3c97e4cf41a2a657e63d4259"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd1c7858641384191ff7033fb1fc65dfcd559c6f"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-42315 (GCVE-0-2024-42315)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:09 – Updated: 2026-05-23 15:52

Title

exfat: fix potential deadlock on __exfat_get_dentry_set

Summary

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential deadlock on __exfat_get_dentry_set When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array is allocated in __exfat_get_entry_set. The problem is that the bh-array is allocated with GFP_KERNEL. It does not make sense. In the following cases, a deadlock for sbi->s_lock between the two processes may occur. CPU0 CPU1 ---- ---- kswapd balance_pgdat lock(fs_reclaim) exfat_iterate lock(&sbi->s_lock) exfat_readdir exfat_get_uniname_from_ext_entry exfat_get_dentry_set __exfat_get_dentry_set kmalloc_array ... lock(fs_reclaim) ... evict exfat_evict_inode lock(&sbi->s_lock) To fix this, let's allocate bh-array with GFP_NOFS.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:09 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/632fb232b6bbf8277…
https://git.kernel.org/stable/c/c052f775ee6ccacd3…
https://git.kernel.org/stable/c/cd1c7858641384191…
https://git.kernel.org/stable/c/a7ac198f8dba791e3…
https://git.kernel.org/stable/c/1d1970493c289e3f4…
https://git.kernel.org/stable/c/89fc548767a215523…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: bd3bdb9e0d656f760b11d0c638d35d7f7068144d , < 632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb (git) Affected: 92dcd7d6c6068bf4fd35a6f64d606e27d634807e , < c052f775ee6ccacd3c97e4cf41a2a657e63d4259 (git) Affected: d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c , < cd1c7858641384191ff7033fb1fc65dfcd559c6f (git) Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < a7ac198f8dba791e3144c4da48a5a9b95773ee4b (git) Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < 1d1970493c289e3f44b9ec847ed26a5dbdf56a62 (git) Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < 89fc548767a2155231128cb98726d6d2ea1256c9 (git) Affected: 5.10.190 , < 5.10.232 (semver) Affected: 5.15.150 , < 5.15.175 (semver)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 5.10.232 , ≤ 5.10.* (semver) Unaffected: 5.15.175 , ≤ 5.15.* (semver) Unaffected: 6.6.44 , ≤ 6.6.* (semver) Unaffected: 6.10.3 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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