CVE-2023-53172

Local service interruption via fs-verity warning

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper input validation in Linux 6.3 allows local users to interrupt service by issuing FS_IOC_ENABLE_VERITY on an ioctl-only fd. The FS_IOC_ENABLE_VERITY path passes a descriptor lacking FMODE_READ to __kernel_read, making its WARN_ON_ONCE check reachable. The trigger requires local access to an fs-verity-capable filesystem and unusual Linux access mode 3, and it reaches a kernel warning.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Linux 6.3 allows local users to interrupt service by issuing FS_IOC_ENABLE_VERITY on an ioctl-only fd. The FS_IOC_ENABLE_VERITY path passes a descriptor lacking FMODE_READ to __kernel_read, making its WARN_ON_ONCE check reachable. The trigger requires local access to an fs-verity-capable filesystem and unusual Linux access mode 3, and it reaches a kernel warning.

The record

CVE
CVE-2023-53172
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
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=56124d6c87fd749477425110d2564166621a89c4 <04839139213cf60d4c5fc792214a08830e294ff8
  2. Affected versionversion=56124d6c87fd749477425110d2564166621a89c4 <85c039cff3c359967cafe90443c02321e950b216
  3. Affected versionversion=6.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=56124d6c87fd749477425110d2564166621a89c4 <04839139213cf60d4c5fc792214a08830e294ff8; version=56124d6c87fd749477425110d2564166621a89c4 <85c039cff3c359967cafe90443c02321e950b216; version=6.3

Published CVSS scores

5.5UbuntuCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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