CVE-2024-0775

Privileged information disclosure via quota-name use-after-free

Published Jan 22, 2024 · Updated Aug 10, 2026

Use-after-free in ext4's __ext4_remount in affected Linux Kernel releases allows local users to disclose kernel memory during remount. When a remount option change fails, __ext4_remount frees the old quota-file names before restoring the previous options and later reuses those freed names. Reaching the failure path requires high-privileged local access to change mount options; disclosure of kernel memory and a system crash are the bounded consequences.

CVSS severity6.7
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ext4's __ext4_remount in affected Linux Kernel releases allows local users to disclose kernel memory during remount. When a remount option change fails, __ext4_remount frees the old quota-file names before restoring the previous options and later reuses those freed names. Reaching the failure path requires high-privileged local access to change mount options; disclosure of kernel memory and a system crash are the bounded consequences.

The record

CVE
CVE-2024-0775
Published
Jan 22, 2024
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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?

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

  1. Affected versionversion=0 <4.14.315
  2. Affected versionversion=4.15 <4.19.283
  3. Affected versionversion=4.20 <5.4.243
  4. Affected versionversion=5.11 <5.15.112
  5. Affected versionversion=5.16 <6.1.29
  6. Affected versionversion=5.5 <5.10.180
  7. Affected versionversion=6.2 <6.2.16
  8. Affected versionversion=6.3 <6.3.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <4.14.315; version=4.15 <4.19.283; version=4.20 <5.4.243; version=5.11 <5.15.112; version=5.16 <6.1.29; version=5.5 <5.10.180; version=6.2 <6.2.16; version=6.3 <6.3.3
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
6.7Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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