ghsa-497m-9xj2-rmhf
Vulnerability from github
Published
2025-01-11 15:30
Modified
2025-11-03 21:32
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:

nilfs2: prevent use of deleted inode

syzbot reported a WARNING in nilfs_rmdir. [1]

Because the inode bitmap is corrupted, an inode with an inode number that should exist as a ".nilfs" file was reassigned by nilfs_mkdir for "file0", causing an inode duplication during execution. And this causes an underflow of i_nlink in rmdir operations.

The inode is used twice by the same task to unmount and remove directories ".nilfs" and "file0", it trigger warning in nilfs_rmdir.

Avoid to this issue, check i_nlink in nilfs_iget(), if it is 0, it means that this inode has been deleted, and iput is executed to reclaim it.

[1] WARNING: CPU: 1 PID: 5824 at fs/inode.c:407 drop_nlink+0xc4/0x110 fs/inode.c:407 ... Call Trace: nilfs_rmdir+0x1b0/0x250 fs/nilfs2/namei.c:342 vfs_rmdir+0x3a3/0x510 fs/namei.c:4394 do_rmdir+0x3b5/0x580 fs/namei.c:4453 __do_sys_rmdir fs/namei.c:4472 [inline] __se_sys_rmdir fs/namei.c:4470 [inline] __x64_sys_rmdir+0x47/0x50 fs/namei.c:4470 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-53690"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-11T13:15:26Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: prevent use of deleted inode\n\nsyzbot reported a WARNING in nilfs_rmdir. [1]\n\nBecause the inode bitmap is corrupted, an inode with an inode number that\nshould exist as a \".nilfs\" file was reassigned by nilfs_mkdir for \"file0\",\ncausing an inode duplication during execution.  And this causes an\nunderflow of i_nlink in rmdir operations.\n\nThe inode is used twice by the same task to unmount and remove directories\n\".nilfs\" and \"file0\", it trigger warning in nilfs_rmdir.\n\nAvoid to this issue, check i_nlink in nilfs_iget(), if it is 0, it means\nthat this inode has been deleted, and iput is executed to reclaim it.\n\n[1]\nWARNING: CPU: 1 PID: 5824 at fs/inode.c:407 drop_nlink+0xc4/0x110 fs/inode.c:407\n...\nCall Trace:\n \u003cTASK\u003e\n nilfs_rmdir+0x1b0/0x250 fs/nilfs2/namei.c:342\n vfs_rmdir+0x3a3/0x510 fs/namei.c:4394\n do_rmdir+0x3b5/0x580 fs/namei.c:4453\n __do_sys_rmdir fs/namei.c:4472 [inline]\n __se_sys_rmdir fs/namei.c:4470 [inline]\n __x64_sys_rmdir+0x47/0x50 fs/namei.c:4470\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f",
  "id": "GHSA-497m-9xj2-rmhf",
  "modified": "2025-11-03T21:32:07Z",
  "published": "2025-01-11T15:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53690"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/284760b320a0bac411b18108316939707dccb12b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55e4baa0d32f0530ddc64c26620e1f2f8fa2724c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d4ed71327b0b5f3b179a19dc3c06be9509ab3db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/901ce9705fbb9f330ff1f19600e5daf9770b0175"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/912188316a8c9e41b8c1603c2276a05043b14f96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef942d233643777f7b2a5deef620e82942983143"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff561987ff12b6a3233431ff659b5d332e22f153"
    },
    {
      "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"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • 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.