CVE-2023-2124Public exploit

Local system crash via unvalidated XFS metadata

Published May 15, 2023 · Updated Aug 2, 2024

Out-of-bounds memory access in Linux Kernel 6.4-rc1 allows local users to crash the system by mounting a crafted XFS image. During dirty-log recovery, XFS discards an older buffer log item and uses newer on-disk AGF metadata without invoking its verifier, allowing malformed metadata into kernel recovery paths. Mounting the supplied image requires privileged local access; a system crash is demonstrated, while privilege escalation is only a reported possibility.

CVSS severity7.8
High
EPSS probability0.49%
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 memory access in Linux Kernel 6.4-rc1 allows local users to crash the system by mounting a crafted XFS image. During dirty-log recovery, XFS discards an older buffer log item and uses newer on-disk AGF metadata without invoking its verifier, allowing malformed metadata into kernel recovery paths. Mounting the supplied image requires privileged local access; a system crash is demonstrated, while privilege escalation is only a reported possibility.

The record

CVE
CVE-2023-2124
Published
May 15, 2023
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=Linux kernel 6.4-rc1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 6.4-rc1

Published CVSS scores

7.8NIST NVDCVSS: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

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

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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