SB20260918137 - Use-after-free in Linux kernel irqchip driver
Published: September 18, 2026
Security Bulletin ID
SB20260918137
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-93072)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to use-after-free in the Renesas IRQC interrupt controller driver when the driver is removed and generic interrupt chip callbacks are subsequently invoked. A local privileged user can remove the driver and trigger a generic interrupt chip callback to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3d39757ef791f90028da9c8b7c1fbbb497237e58
- https://git.kernel.org/stable/c/4bf7614d048434326081eef0ebef33cb77fe2ffc
- https://git.kernel.org/stable/c/616dd89d81ad9a3cf1cfff4088a4c43e4e00d6ba
- https://git.kernel.org/stable/c/7c614f83301d464e2fb498d63552490d137ea10d
- https://git.kernel.org/stable/c/9acc996cb2e8477ae81bd7c067fec15202d6bc89