CVE-2022-49506

Kernel panic via vblank callback race

Published Feb 26, 2025 · Updated May 11, 2026

A race condition in the MediaTek DRM driver in affected Linux kernel versions allows local users to crash the system during display activity. The mtk_disp_ovl_irq_handler function can dereference NULL callback data when it races with mtk_ovl_disable_vblank. Exploitation requires the MediaTek display path and low local privileges; the documented consequence is a kernel panic, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

A race condition in the MediaTek DRM driver in affected Linux kernel versions allows local users to crash the system during display activity. The mtk_disp_ovl_irq_handler function can dereference NULL callback data when it races with mtk_ovl_disable_vblank. Exploitation requires the MediaTek display path and low local privileges; the documented consequence is a kernel panic, not data access or modification.

The record

CVE
CVE-2022-49506
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.12
  2. Affected versionversion=9b0704988b151824a51133dc4c921f4273c5d839 <3a4027b5971fe2a94e32754f007d9d3c12c68ad1
  3. Affected versionversion=9b0704988b151824a51133dc4c921f4273c5d839 <8a265d9838bc3c63579002d55c2b2c655c4f8f26
  4. Affected versionversion=9b0704988b151824a51133dc4c921f4273c5d839 <8a2dbdeccef6de47565638abdf3c25f41cdffc37
  5. Affected versionversion=9b0704988b151824a51133dc4c921f4273c5d839 <b74d921b900b6ce38c6247c0a1c86be9f3746493

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=9b0704988b151824a51133dc4c921f4273c5d839 <3a4027b5971fe2a94e32754f007d9d3c12c68ad1; version=9b0704988b151824a51133dc4c921f4273c5d839 <8a265d9838bc3c63579002d55c2b2c655c4f8f26; version=9b0704988b151824a51133dc4c921f4273c5d839 <8a2dbdeccef6de47565638abdf3c25f41cdffc37; version=9b0704988b151824a51133dc4c921f4273c5d839 <b74d921b900b6ce38c6247c0a1c86be9f3746493

Published CVSS scores

5.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo