CVE-2023-52682

Local data exposure via F2FS writeback race

Published May 17, 2024 · Updated Jun 1, 2026

A race condition in Linux kernel F2FS allows local users to expose or corrupt file data during concurrent garbage collection and writes. For compressed, non-encrypted inodes, the in-place update path omits f2fs_wait_on_block_writeback(), allowing delayed garbage-collection I/O to overwrite newer data. Exploitation requires local low-privileged access and the affected inode state; the resulting stale-data exposure or corruption can also interrupt service.

CVSS severity7.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux kernel F2FS allows local users to expose or corrupt file data during concurrent garbage collection and writes. For compressed, non-encrypted inodes, the in-place update path omits f2fs_wait_on_block_writeback(), allowing delayed garbage-collection I/O to overwrite newer data. Exploitation requires local low-privileged access and the affected inode state; the resulting stale-data exposure or corruption can also interrupt service.

The record

CVE
CVE-2023-52682
Published
May 17, 2024
Updated
Jun 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 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=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <2bfe8fdb674f71747553a65f2ef27e14c8880655
  2. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <4535be48780431753505e74e1b1ad4836a189bc2
  3. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <55fdc1c24a1d6229fe0ecf31335fb9a2eceaaa00
  4. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <9bfd5ea71521d0e522ba581c6ccc5db93759c0c3
  5. Affected versionversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <f904c156d8011d8291ffd5b6b398f3747e294986
  6. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <2bfe8fdb674f71747553a65f2ef27e14c8880655; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <4535be48780431753505e74e1b1ad4836a189bc2; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <55fdc1c24a1d6229fe0ecf31335fb9a2eceaaa00; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <9bfd5ea71521d0e522ba581c6ccc5db93759c0c3; version=4c8ff7095bef64fc47e996a938f7d57f9e077da3 <f904c156d8011d8291ffd5b6b398f3747e294986; version=5.6

Published CVSS scores

7.1NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 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-125Out-of-bounds Read

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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