CVE-2026-46058

Local kernel crash via m2m context race

Published May 27, 2026 · Updated May 27, 2026

Race condition in the Amphion VPU driver in Linux Kernel allows local users to crash the kernel through concurrent context release. v4l2_m2m_ctx_release() frees m2m_ctx while v4l2_m2m_try_run() proceeds to device_run() with that context, causing a use-after-free read and kernel panic. Triggering requires local low-privileged access and concurrent m2m teardown and scheduling in the Amphion driver; the documented consequence is a system crash.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Amphion VPU driver in Linux Kernel allows local users to crash the kernel through concurrent context release. v4l2_m2m_ctx_release() frees m2m_ctx while v4l2_m2m_try_run() proceeds to device_run() with that context, causing a use-after-free read and kernel panic. Triggering requires local low-privileged access and concurrent m2m teardown and scheduling in the Amphion driver; the documented consequence is a system crash.

The record

CVE
CVE-2026-46058
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=3cd084519c6f91cbef9d604bcf26844fa81d4922 <42dc622776f3ce1a6c31b13bdc686f7295e3b323
  2. Affected versionversion=3cd084519c6f91cbef9d604bcf26844fa81d4922 <6be2cb75bc1300080cfc8051579f22efae9401f7
  3. Affected versionversion=3cd084519c6f91cbef9d604bcf26844fa81d4922 <8cd35ceadcfc8c5da2eb7f7ce24525ce9d4ee62e
  4. Affected versionversion=3cd084519c6f91cbef9d604bcf26844fa81d4922 <da4f46c5cf1d26e6b09418ad453e152f2e75a02c
  5. Affected versionversion=3cd084519c6f91cbef9d604bcf26844fa81d4922 <fdc150dac1adb9a98be9d6956cff0348838b024a
  6. Affected versionversion=5.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3cd084519c6f91cbef9d604bcf26844fa81d4922 <42dc622776f3ce1a6c31b13bdc686f7295e3b323; version=3cd084519c6f91cbef9d604bcf26844fa81d4922 <6be2cb75bc1300080cfc8051579f22efae9401f7; version=3cd084519c6f91cbef9d604bcf26844fa81d4922 <8cd35ceadcfc8c5da2eb7f7ce24525ce9d4ee62e; version=3cd084519c6f91cbef9d604bcf26844fa81d4922 <da4f46c5cf1d26e6b09418ad453e152f2e75a02c; version=3cd084519c6f91cbef9d604bcf26844fa81d4922 <fdc150dac1adb9a98be9d6956cff0348838b024a; version=5.18

Published CVSS scores

7.8kernel.orgCVSS: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.

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

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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