CVE-2026-90427Hinoki check available

Kernel crash via freed SMMU fallback dereference

Published Sep 17, 2026 · Updated Sep 18, 2026

Use-after-free in Linux 6.12 through 7.2.5 allows local users to corrupt kernel memory or crash systems during Tegra241 CMDQV probing. When devm_krealloc() relocates the smmu, __tegra241_cmdqv_probe() retains a freed pointer that its fallback path dereferences after a later failure. The path requires NVIDIA Tegra241 CMDQV hardware and a post-reallocation probe failure; the resulting memory corruption can interrupt service.

CVSS severity5.3
Medium
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in Linux 6.12 through 7.2.5 allows local users to corrupt kernel memory or crash systems during Tegra241 CMDQV probing. When devm_krealloc() relocates the smmu, __tegra241_cmdqv_probe() retains a freed pointer that its fallback path dereferences after a later failure. The path requires NVIDIA Tegra241 CMDQV hardware and a post-reallocation probe failure; the resulting memory corruption can interrupt service.

The record

CVE
CVE-2026-90427
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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 <86197679b293f0601c3331d545f99a70a7780aa9
  3. Affected versionversion=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <d4d05f55e9da646ec03adfa77260eb46f4163749

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <86197679b293f0601c3331d545f99a70a7780aa9; version=918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <d4d05f55e9da646ec03adfa77260eb46f4163749

Published CVSS scores

5.3Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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