CVE-2026-90124Public exploit

Interrupt loss via racy status-register clearing

Published Sep 17, 2026 · Updated Sep 17, 2026

An interrupt race in Renesas RZ/G2L support in Linux 6.0 allows local users to discard interrupts through simultaneous GPIO events. The rzg2l_clear_irq_int() and rzg2l_clear_tint_int() functions read-modify-write the write-0-to-clear ISCR/TSCR registers, accidentally clearing another interrupt that arrives between the read and write. Triggering requires access to GPIOs on affected hardware and concurrent interrupts; the documented consequence is lost interrupt delivery, not a demonstrated crash or reboot.

CVSS severity2.5
Low
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

An interrupt race in Renesas RZ/G2L support in Linux 6.0 allows local users to discard interrupts through simultaneous GPIO events. The rzg2l_clear_irq_int() and rzg2l_clear_tint_int() functions read-modify-write the write-0-to-clear ISCR/TSCR registers, accidentally clearing another interrupt that arrives between the read and write. Triggering requires access to GPIOs on affected hardware and concurrent interrupts; the documented consequence is lost interrupt delivery, not a demonstrated crash or reboot.

The record

CVE
CVE-2026-90124
Published
Sep 17, 2026
Updated
Sep 17, 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 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=3fed09559cd8be79568d368ce02bf7f2d56259b6 <3791e242ec2e5a5cd9e010a75ed1125d0e84d394
  2. Affected versionversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <38c6831fefde0ff89f8d2dcb924f957a89dec414
  3. Affected versionversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <50b10bd0c2d721ad38abd1abe3acdefb6caa0944
  4. Affected versionversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <b5ba8b861b5d833394bd23df3f4b59883ef18c88
  5. Affected versionversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <c043591f03a8111f7d306b8122c444a949486269
  6. Affected versionversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <dbecbe23dc606c4af68b4591a41124186f5c1802
  7. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3fed09559cd8be79568d368ce02bf7f2d56259b6 <3791e242ec2e5a5cd9e010a75ed1125d0e84d394; version=3fed09559cd8be79568d368ce02bf7f2d56259b6 <38c6831fefde0ff89f8d2dcb924f957a89dec414; version=3fed09559cd8be79568d368ce02bf7f2d56259b6 <50b10bd0c2d721ad38abd1abe3acdefb6caa0944; version=3fed09559cd8be79568d368ce02bf7f2d56259b6 <b5ba8b861b5d833394bd23df3f4b59883ef18c88; version=3fed09559cd8be79568d368ce02bf7f2d56259b6 <c043591f03a8111f7d306b8122c444a949486269; version=3fed09559cd8be79568d368ce02bf7f2d56259b6 <dbecbe23dc606c4af68b4591a41124186f5c1802; version=6.0

Published CVSS scores

2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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Technologies

Your stack

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Your stack

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