CVE-2024-50229

Kernel hang via nilfs2 symlink reclaim deadlock

Published Nov 9, 2024 · Updated May 23, 2026

Deadlock in Linux nilfs2 allows local users to hang affected kernels by creating a symlink while filesystem memory reclamation is possible. The nilfs_symlink path leaves __GFP_FS enabled in the new symlink page cache, so page_symlink can enter filesystem reclaim and reacquire locks while ns_segctor_sem is held. Exploitation requires local access to create a symlink on a mounted nilfs2 filesystem and memory pressure sufficient to invoke filesystem reclaim.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in Linux nilfs2 allows local users to hang affected kernels by creating a symlink while filesystem memory reclamation is possible. The nilfs_symlink path leaves __GFP_FS enabled in the new symlink page cache, so page_symlink can enter filesystem reclaim and reacquire locks while ns_segctor_sem is held. Exploitation requires local access to create a symlink on a mounted nilfs2 filesystem and memory pressure sufficient to invoke filesystem reclaim.

The record

CVE
CVE-2024-50229
Published
Nov 9, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 9, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=076e4ab3279eb3ddb206de44d04df7aeb2428e09
  2. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <1246d86e7bbde265761932c6e2dce28c69cdcb91
  3. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38
  4. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <69548bb663fcb63f9ee0301be808a36b9d78dac3
  5. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24
  6. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <a1686db1e59f8fc016c4c9361e2119dd206f479a
  7. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <b3a033e3ecd3471248d474ef263aadc0059e516a
  8. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <c72e0df0b56c1166736dc8eb62070ebb12591447
  9. Affected versionversion=21fc61c73c3903c4c312d0802da01ec2b323d174 <cc38c596e648575ce58bfc31623a6506eda4b94a
  10. Affected versionversion=4.4.116 <4.5
  11. Affected versionversion=4.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=076e4ab3279eb3ddb206de44d04df7aeb2428e09; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <1246d86e7bbde265761932c6e2dce28c69cdcb91; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <69548bb663fcb63f9ee0301be808a36b9d78dac3; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <a1686db1e59f8fc016c4c9361e2119dd206f479a; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <b3a033e3ecd3471248d474ef263aadc0059e516a; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <c72e0df0b56c1166736dc8eb62070ebb12591447; version=21fc61c73c3903c4c312d0802da01ec2b323d174 <cc38c596e648575ce58bfc31623a6506eda4b94a; version=4.4.116 <4.5; version=4.5

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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