CVE-2026-90430

System crash via prematurely published LVCMDQ

Published Sep 17, 2026 · Updated Sep 21, 2026

A race condition in the Linux kernel Tegra241 CMDQV driver allows local users to crash the system when a latched LVCMDQ error fires. tegra241_vintf_init_lvcmdq() publishes a new vcmdq before its command queue is built, allowing the error ISR to pass zeroed queue state to __arm_smmu_cmdq_skip_err(). Triggering requires high-privileged local access, Tegra241 hardware, a latched error, and the narrow initialization window; the resulting NULL register dereference crashes the kernel.

CVSS severity4.1
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in the Linux kernel Tegra241 CMDQV driver allows local users to crash the system when a latched LVCMDQ error fires. tegra241_vintf_init_lvcmdq() publishes a new vcmdq before its command queue is built, allowing the error ISR to pass zeroed queue state to __arm_smmu_cmdq_skip_err(). Triggering requires high-privileged local access, Tegra241 hardware, a latched error, and the narrow initialization window; the resulting NULL register dereference crashes the kernel.

The record

CVE
CVE-2026-90430
Published
Sep 17, 2026
Updated
Sep 21, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 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=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <792f720fc23fe5bd6508d40ed73ae739debd6dcb
  3. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <b4535b403d6bf9bcc24dbd62096711329b9c612c
  4. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <cbc41aacd49e695338940196e7084770365e1b68
  5. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <d5ec248ee1c79354979c23f7f390e856e9535651

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <792f720fc23fe5bd6508d40ed73ae739debd6dcb; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <b4535b403d6bf9bcc24dbd62096711329b9c612c; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <cbc41aacd49e695338940196e7084770365e1b68; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <d5ec248ee1c79354979c23f7f390e856e9535651

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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