VulnerabilityPublished 17 Sep 2026Updated 12 Oct 2026

CVE-2026-90428: Linux kernel · iommu/tegra241-cmdqv: Don't run the error ISR before probe sets up vintfs

Affects Linux kernelSource GCVE Database

Not known to be exploited.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Ubuntu 26.04 LTSlinux`pkg:deb/ubuntu/linux?arch=source&distro=resolute`Other threats	Affected 6.17.0-5.5 – 7.0.0-38.38 23 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-aws`pkg:deb/ubuntu/linux-aws?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1014.14 15 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure`pkg:deb/ubuntu/linux-azure?arch=source&distro=resolute`Other threats	Affected 6.17.0-1003.3 – 7.0.0-1017.17 15 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-azure-fde`pkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resolute`Other threats	Affected 7.0.0-1003.3 – 7.0.0-1016.16 9 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gcp`pkg:deb/ubuntu/linux-gcp?arch=source&distro=resolute`Other threats	Affected 6.17.0-1002.2 – 7.0.0-1014.14 13 affected builds	Fixed in–
Ubuntu 26.04 LTSlinux-gke`pkg:deb/ubuntu/linux-gke?arch=source&distro=resolute`Other threats	Affected 7.0.0-1002.3 – 7.0.0-1008.9 6 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available that changes the order of operations in the probe function to allocate and zero the vintfs array before requesting the error IRQ. Users should apply the official kernel updates that include this fix. Since this is a Linux kernel vulnerability, updating to patched kernel versions is the recommended remediation.

Description

A vulnerability in the Linux kernel's iommu/tegra241-cmdqv driver could cause the error interrupt service routine (ISR) to run before the probe function properly initializes required data structures. This occurs because the error IRQ is requested before the vintfs array is allocated and zeroed. As a result, a latched error interrupt firing early can cause the ISR to access uninitialized memory, potentially leading to undefined behavior. The issue is resolved by requesting the IRQ only after the vintfs array is safely allocated and initialized.

Impact

The vulnerability may cause the interrupt service routine to access uninitialized memory, which can lead to undefined behavior such as kernel instability or crashes. There is no indication of remote exploitability or privilege escalation from the provided data. No known exploits in the wild have been reported.

Summary

The Linux kernel vulnerability CVE-2026-90428 involves the iommu/tegra241-cmdqv driver where the error ISR can be triggered before the probe function (__tegra241_cmdqv_probe) sets up the vintfs array and the number of vintfs. The probe function requests the error IRQ prematurely, and if a CMDQV device has a latched error across a kexec, the IRQ fires immediately upon request. The ISR then walks an uninitialized vintfs array, which can cause unsafe behavior. The fix involves deferring the IRQ request until after the vintfs array is allocated and zeroed, ensuring the ISR safely skips NULL slots.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Oct 2026, 22:57 UTC

Technical details

References

Community reviews

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