github - ghsa-94vp-7849-58r6

GHSA-94VP-7849-58R6

Vulnerability from github – Published: 2025-01-31 12:33 – Updated: 2025-02-03 21:31

Details

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

afs: Fix merge preference rule failure condition

syzbot reported a lock held when returning to userspace[1]. This is because if argc is less than 0 and the function returns directly, the held inode lock is not released.

Fix this by store the error in ret and jump to done to clean up instead of returning directly.

[dh: Modified Lizhi Xu's original patch to make it honour the error code from afs_split_string()]

[1] WARNING: lock held when returning to user space! 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Not tainted

syz-executor133/5823 is leaving the kernel with locks still held! 1 lock held by syz-executor133/5823: #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: afs_proc_addr_prefs_write+0x2bb/0x14e0 fs/afs/addr_prefs.c:388

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-2025-21672"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-31T12:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix merge preference rule failure condition\n\nsyzbot reported a lock held when returning to userspace[1].  This is\nbecause if argc is less than 0 and the function returns directly, the held\ninode lock is not released.\n\nFix this by store the error in ret and jump to done to clean up instead of\nreturning directly.\n\n[dh: Modified Lizhi Xu\u0027s original patch to make it honour the error code\nfrom afs_split_string()]\n\n[1]\nWARNING: lock held when returning to user space!\n6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Not tainted\n------------------------------------------------\nsyz-executor133/5823 is leaving the kernel with locks still held!\n1 lock held by syz-executor133/5823:\n #0: ffff888071cffc00 (\u0026sb-\u003es_type-\u003ei_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]\n #0: ffff888071cffc00 (\u0026sb-\u003es_type-\u003ei_mutex_key#9){++++}-{4:4}, at: afs_proc_addr_prefs_write+0x2bb/0x14e0 fs/afs/addr_prefs.c:388",
  "id": "GHSA-94vp-7849-58r6",
  "modified": "2025-02-03T21:31:49Z",
  "published": "2025-01-31T12:33:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21672"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17a4fde81d3a7478d97d15304a6d61094a10c2e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22be1d90a6211c88dd093b25d1f3aa974d0d9f9d"
    }
  ],
  "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-2025-21672 (GCVE-0-2025-21672)

Vulnerability from cvelistv5 – Published: 2025-01-31 11:25 – Updated: 2025-10-01 19:57

Summary

In the Linux kernel, the following vulnerability has been resolved: afs: Fix merge preference rule failure condition syzbot reported a lock held when returning to userspace[1]. This is because if argc is less than 0 and the function returns directly, the held inode lock is not released. Fix this by store the error in ret and jump to done to clean up instead of returning directly. [dh: Modified Lizhi Xu's original patch to make it honour the error code from afs_split_string()] [1] WARNING: lock held when returning to user space! 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Not tainted ------------------------------------------------ syz-executor133/5823 is leaving the kernel with locks still held! 1 lock held by syz-executor133/5823: #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: afs_proc_addr_prefs_write+0x2bb/0x14e0 fs/afs/addr_prefs.c:388

Severity ?

5.5 (Medium)


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

CWE

CWE-667 - Improper Locking

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/22be1d90a6211c88d…
	https://git.kernel.org/stable/c/17a4fde81d3a7478d…

Impacted products

Vendor

Product

Version

Linux

Affected: f94f70d39cc2d54079ebae934862198516315db2 , < 22be1d90a6211c88dd093b25d1f3aa974d0d9f9d (git)
Affected: f94f70d39cc2d54079ebae934862198516315db2 , < 17a4fde81d3a7478d97d15304a6d61094a10c2e3 (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.11 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)

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    "adp": [
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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            "other": {
              "content": {
                "id": "CVE-2025-21672",
                "options": [
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:52:11.531644Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
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              }
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        "title": "CISA ADP Vulnrichment"
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          "versions": [
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            },
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              "version": "6.13",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix merge preference rule failure condition\n\nsyzbot reported a lock held when returning to userspace[1].  This is\nbecause if argc is less than 0 and the function returns directly, the held\ninode lock is not released.\n\nFix this by store the error in ret and jump to done to clean up instead of\nreturning directly.\n\n[dh: Modified Lizhi Xu\u0027s original patch to make it honour the error code\nfrom afs_split_string()]\n\n[1]\nWARNING: lock held when returning to user space!\n6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Not tainted\n------------------------------------------------\nsyz-executor133/5823 is leaving the kernel with locks still held!\n1 lock held by syz-executor133/5823:\n #0: ffff888071cffc00 (\u0026sb-\u003es_type-\u003ei_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]\n #0: ffff888071cffc00 (\u0026sb-\u003es_type-\u003ei_mutex_key#9){++++}-{4:4}, at: afs_proc_addr_prefs_write+0x2bb/0x14e0 fs/afs/addr_prefs.c:388"
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    "datePublished": "2025-01-31T11:25:35.246Z",
    "dateReserved": "2024-12-29T08:45:45.736Z",
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  },
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}

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-94VP-7849-58R6

CVE-2025-21672 (GCVE-0-2025-21672)

Tags

Sightings

Nomenclature