CVE-2023-52748

Kernel memory corruption via undersized f2fs slab-name buffer

Published May 21, 2024 · Updated May 11, 2026

Out-of-bounds write in affected Linux kernel branches allows local users to corrupt kernel memory during F2FS compression-cache setup. f2fs_init_page_array_cache formats a device major and minor number into a 32-byte slab_name array even though the resulting name can require 35 bytes. The path is reached only while initializing compression support for an F2FS volume, and public sources do not demonstrate code execution.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in affected Linux kernel branches allows local users to corrupt kernel memory during F2FS compression-cache setup. f2fs_init_page_array_cache formats a device major and minor number into a 32-byte slab_name array even though the resulting name can require 35 bytes. The path is reached only while initializing compression support for an F2FS volume, and public sources do not demonstrate code execution.

The record

CVE
CVE-2023-52748
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE 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=31083031709eea6530f0551d59eecdb2e68265ef <3eebe636cac53886bd5d1cdd55e082ec9e84983f
  2. Affected versionversion=31083031709eea6530f0551d59eecdb2e68265ef <526dd7540a09ecf87b5f54f3ab4e0a2528f25a79
  3. Affected versionversion=31083031709eea6530f0551d59eecdb2e68265ef <6fca08fd3085253b48fcb1bd243a0a5e18821a00
  4. Affected versionversion=31083031709eea6530f0551d59eecdb2e68265ef <c041f5ddef00c731c541e00bc8ae97b8c84c682f
  5. Affected versionversion=31083031709eea6530f0551d59eecdb2e68265ef <e0d4e8acb3789c5a8651061fbab62ca24a45c063
  6. Affected versionversion=31083031709eea6530f0551d59eecdb2e68265ef <e4088d7d8f1123006d46a42edf51b8c960a58ef9
  7. Affected versionversion=5.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=31083031709eea6530f0551d59eecdb2e68265ef <3eebe636cac53886bd5d1cdd55e082ec9e84983f; version=31083031709eea6530f0551d59eecdb2e68265ef <526dd7540a09ecf87b5f54f3ab4e0a2528f25a79; version=31083031709eea6530f0551d59eecdb2e68265ef <6fca08fd3085253b48fcb1bd243a0a5e18821a00; version=31083031709eea6530f0551d59eecdb2e68265ef <c041f5ddef00c731c541e00bc8ae97b8c84c682f; version=31083031709eea6530f0551d59eecdb2e68265ef <e0d4e8acb3789c5a8651061fbab62ca24a45c063; version=31083031709eea6530f0551d59eecdb2e68265ef <e4088d7d8f1123006d46a42edf51b8c960a58ef9; version=5.10

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.1SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/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-787Out-of-bounds Write

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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