SB2026091995 - Race condition in Linux kernel irqchip driver
Published: September 19, 2026
Security Bulletin ID
SB2026091995
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-90124)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause interrupts to be lost.
The vulnerability exists due to a race condition in the Renesas RZ/G2L interrupt controller driver's rzg2l_clear_irq_int() and rzg2l_clear_tint_int() functions when clearing interrupt status bits. A local user can trigger multiple interrupts simultaneously to cause interrupts to be lost.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3791e242ec2e5a5cd9e010a75ed1125d0e84d394
- https://git.kernel.org/stable/c/38c6831fefde0ff89f8d2dcb924f957a89dec414
- https://git.kernel.org/stable/c/50b10bd0c2d721ad38abd1abe3acdefb6caa0944
- https://git.kernel.org/stable/c/b5ba8b861b5d833394bd23df3f4b59883ef18c88
- https://git.kernel.org/stable/c/c043591f03a8111f7d306b8122c444a949486269
- https://git.kernel.org/stable/c/dbecbe23dc606c4af68b4591a41124186f5c1802