CVE-2023-37454Public exploit

System crash via UDF use-after-free write

Published Jul 6, 2023 · Updated Nov 20, 2024

Use-after-free in Linux kernel UDF handling through 6.4.2 allows local users to crash the system via a crafted filesystem image. The block layer permits writes to a mounted block device, leaving UDF metadata freed before udf_close_lvid updates it during superblock teardown. Exploitation requires privileges to mount and modify the underlying block device, and the demonstrated consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.36%
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 UDF handling through 6.4.2 allows local users to crash the system via a crafted filesystem image. The block layer permits writes to a mounted block device, leaving UDF metadata freed before udf_close_lvid updates it during superblock teardown. Exploitation requires privileges to mount and modify the underlying block device, and the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2023-37454
Published
Jul 6, 2023
Updated
Nov 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.

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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-416Use After Free
T1499Endpoint Denial of Service

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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