CVE-2026-90428

Denial of service via premature error interrupt

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux 6.12 has a Tegra241 CMDQV initialization flaw that allows local users to interrupt service via an early error interrupt. __tegra241_cmdqv_probe() registers the error IRQ before initializing cmdqv->vintfs and num_vintfs, allowing tegra241_cmdqv_isr() to access the uninitialized array. Exposure requires CMDQV hardware left enabled with a latched error across kexec and, under Amazon's assessment, administrative privileges; the sources do not specify a crash or hang.

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

Linux 6.12 has a Tegra241 CMDQV initialization flaw that allows local users to interrupt service via an early error interrupt. __tegra241_cmdqv_probe() registers the error IRQ before initializing cmdqv->vintfs and num_vintfs, allowing tegra241_cmdqv_isr() to access the uninitialized array. Exposure requires CMDQV hardware left enabled with a latched error across kexec and, under Amazon's assessment, administrative privileges; the sources do not specify a crash or hang.

The record

CVE
CVE-2026-90428
Published
Sep 17, 2026
Updated
Sep 17, 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 17, 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 <2f627118b668659c6b195ac48beedb1bf8f53368
  3. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <5acd67ceb38debe2fbf70ea35e2dec9f7ab01bbd
  4. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <a168254ff8db08f2292be3d8fcbd37d2bb8c3d2d
  5. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <b1605a56745f22670205f6561df5771bbbb62a99

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <2f627118b668659c6b195ac48beedb1bf8f53368; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <5acd67ceb38debe2fbf70ea35e2dec9f7ab01bbd; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <a168254ff8db08f2292be3d8fcbd37d2bb8c3d2d; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <b1605a56745f22670205f6561df5771bbbb62a99

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.

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

Technologies

Your stack

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