CVE-2025-21824

Local service interruption via uninitialized host1x mutex

Published Feb 27, 2025 · Updated May 11, 2026

Use of an uninitialized resource in the Linux kernel 6.12 through 6.12.15 and 6.13 through 6.13.3 allows local users to interrupt service. The host1x runtime-resume path enters host1x_intr_start and locks intr_mutex before the interrupt initialization path initializes that mutex. Reachability requires local low-privileged access and NVIDIA Tegra host1x hardware; affected execution triggers kernel lock diagnostics and interrupts service.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in the Linux kernel 6.12 through 6.12.15 and 6.13 through 6.13.3 allows local users to interrupt service. The host1x runtime-resume path enters host1x_intr_start and locks intr_mutex before the interrupt initialization path initializes that mutex. Reachability requires local low-privileged access and NVIDIA Tegra host1x hardware; affected execution triggers kernel lock diagnostics and interrupts service.

The record

CVE
CVE-2025-21824
Published
Feb 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE 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=6.12
  2. Affected versionversion=c8347f915e6779f6c861e7a041adf3559d51b363 <02458fbfaa0170aabf8506f7d4ed054f02414251
  3. Affected versionversion=c8347f915e6779f6c861e7a041adf3559d51b363 <127e91638ddcd02b80de92fec2240609a9f90426
  4. Affected versionversion=c8347f915e6779f6c861e7a041adf3559d51b363 <396d8e5136b4476672bc15b83ba312486bb4bf76

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=c8347f915e6779f6c861e7a041adf3559d51b363 <02458fbfaa0170aabf8506f7d4ed054f02414251; version=c8347f915e6779f6c861e7a041adf3559d51b363 <127e91638ddcd02b80de92fec2240609a9f90426; version=c8347f915e6779f6c861e7a041adf3559d51b363 <396d8e5136b4476672bc15b83ba312486bb4bf76

Published CVSS scores

5.5CISA-ADPCVSS: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

CWE-908Use of Uninitialized Resource

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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