CVE-2023-53214

Kernel memory corruption via unchecked iostat type

Published Sep 15, 2025 · Updated Sep 15, 2025

Out-of-bounds access in Linux kernel f2fs allows local users to corrupt kernel memory by issuing file I/O on an f2fs volume. __update_iostat_latency uses an unchecked iostat type to index latency arrays, so NR_PAGE_TYPE can address storage beyond their bounds. The path requires a mounted f2fs volume with iostat enabled, which defaults to disabled, and the upstream assessment states that the invalid type is not attacker-influenceable.

CVSS severity7.0
High
EPSS probability0.17%
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 access in Linux kernel f2fs allows local users to corrupt kernel memory by issuing file I/O on an f2fs volume. __update_iostat_latency uses an unchecked iostat type to index latency arrays, so NR_PAGE_TYPE can address storage beyond their bounds. The path requires a mounted f2fs volume with iostat enabled, which defaults to disabled, and the upstream assessment states that the invalid type is not attacker-influenceable.

The record

CVE
CVE-2023-53214
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=5.15
  2. Affected versionversion=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <0dbbf0fb38d5ec5d4138d1aeaeb43d9217b9a592
  3. Affected versionversion=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <20b4f3de0f3932f71b4a8daf0671e517a8d98022
  4. Affected versionversion=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <22ddbbff116ee7dce5431feb1c0f36a507d2d68d
  5. Affected versionversion=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <aa4d726af72a21732ce120484e0b1240674a13b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <0dbbf0fb38d5ec5d4138d1aeaeb43d9217b9a592; version=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <20b4f3de0f3932f71b4a8daf0671e517a8d98022; version=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <22ddbbff116ee7dce5431feb1c0f36a507d2d68d; version=a4b6817625e71d5d4aee16cacf7a7fec077c6dbe <aa4d726af72a21732ce120484e0b1240674a13b3

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0LinuxCVSS:3.1/AV:L/AC:H/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

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-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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