CVE-2024-57892

Kernel use-after-free via dangling quota pointer

Published Jan 15, 2025 · Updated May 11, 2026

Use-after-free in Linux kernel OCFS2 allows local users to access freed quota data through quota_getnextquota after a read-only remount. Remount cleanup frees dqi_priv without clearing it, while ocfs2_get_next_id checks quota-usage flags but not DQUOT_SUSPENDED before dereferencing the pointer. The sequence requires CAP_SYS_ADMIN, an OCFS2 quota mount, a read-only remount, and a quota query; further consequences are not documented.

CVSS severity7.8
High
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 Linux kernel OCFS2 allows local users to access freed quota data through quota_getnextquota after a read-only remount. Remount cleanup frees dqi_priv without clearing it, while ocfs2_get_next_id checks quota-usage flags but not DQUOT_SUSPENDED before dereferencing the pointer. The sequence requires CAP_SYS_ADMIN, an OCFS2 quota mount, a read-only remount, and a quota query; further consequences are not documented.

The record

CVE
CVE-2024-57892
Published
Jan 15, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.6
  2. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <2d431192486367eee03cc28d0b53b97dafcb8e63
  3. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <2e3d203b1adede46bbba049e497765d67865be18
  4. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <58f9e20e2a7602e1dd649a1ec4790077c251cb6c
  5. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <5f3fd772d152229d94602bca243fbb658068a597
  6. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <8ff6f635a08c30559ded0c110c7ce03ba7747d11
  7. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <ba950a02d8d23811aa1120affd3adedcfac6153d
  8. Affected versionversion=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <f44e6d70c100614c211703f065cad448050e4a0e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <2d431192486367eee03cc28d0b53b97dafcb8e63; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <2e3d203b1adede46bbba049e497765d67865be18; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <58f9e20e2a7602e1dd649a1ec4790077c251cb6c; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <5f3fd772d152229d94602bca243fbb658068a597; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <8ff6f635a08c30559ded0c110c7ce03ba7747d11; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <ba950a02d8d23811aa1120affd3adedcfac6153d; version=8f9e8f5fcc059a3cba87ce837c88316797ef3645 <f44e6d70c100614c211703f065cad448050e4a0e

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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

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Your stack

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