CVE-2024-42315

System hang via exFAT reclaim lock inversion

Published Aug 17, 2024 · Updated May 23, 2026

Improper locking in Linux kernel exFAT support allows local users to hang the system by accessing a directory with excessive entries. The __exfat_get_dentry_set path allocates a buffer-head array with GFP_KERNEL while sbi->s_lock is held, allowing filesystem reclaim to invert the same lock against inode eviction. Local access to an exFAT filesystem containing more than ES_MAX_ENTRY_NUM directory entries is required, and the resulting deadlock interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper locking in Linux kernel exFAT support allows local users to hang the system by accessing a directory with excessive entries. The __exfat_get_dentry_set path allocates a buffer-head array with GFP_KERNEL while sbi->s_lock is held, allowing filesystem reclaim to invert the same lock against inode eviction. Local access to an exFAT filesystem containing more than ES_MAX_ENTRY_NUM directory entries is required, and the resulting deadlock interrupts the host.

The record

CVE
CVE-2024-42315
Published
Aug 17, 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. Aug 17, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.10.190 <5.10.232
  2. Affected versionversion=5.15.150 <5.15.175
  3. Affected versionversion=6.2
  4. Affected versionversion=92dcd7d6c6068bf4fd35a6f64d606e27d634807e <c052f775ee6ccacd3c97e4cf41a2a657e63d4259
  5. Affected versionversion=a3ff29a95fde16906304455aa8c0bd84eb770258 <1d1970493c289e3f44b9ec847ed26a5dbdf56a62
  6. Affected versionversion=a3ff29a95fde16906304455aa8c0bd84eb770258 <89fc548767a2155231128cb98726d6d2ea1256c9
  7. Affected versionversion=a3ff29a95fde16906304455aa8c0bd84eb770258 <a7ac198f8dba791e3144c4da48a5a9b95773ee4b
  8. Affected versionversion=bd3bdb9e0d656f760b11d0c638d35d7f7068144d <632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb
  9. Affected versionversion=d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c <cd1c7858641384191ff7033fb1fc65dfcd559c6f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10.190 <5.10.232; version=5.15.150 <5.15.175; version=6.2; version=92dcd7d6c6068bf4fd35a6f64d606e27d634807e <c052f775ee6ccacd3c97e4cf41a2a657e63d4259; version=a3ff29a95fde16906304455aa8c0bd84eb770258 <1d1970493c289e3f44b9ec847ed26a5dbdf56a62; version=a3ff29a95fde16906304455aa8c0bd84eb770258 <89fc548767a2155231128cb98726d6d2ea1256c9; version=a3ff29a95fde16906304455aa8c0bd84eb770258 <a7ac198f8dba791e3144c4da48a5a9b95773ee4b; version=bd3bdb9e0d656f760b11d0c638d35d7f7068144d <632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb; version=d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c <cd1c7858641384191ff7033fb1fc65dfcd559c6f

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo