Use-after-free in Linux kernel - CVE-2026-90433
Published: September 18, 2026
Vulnerability identifier: #VU151045
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90433
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a use-after-free condition.
The vulnerability exists due to improper resource lifetime management in the tiny_spi_irq() interrupt handler when handling a late or latched interrupt during device removal. A local user can cause the interrupt handler to access freed controller memory to cause a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-90433
Install security update from vendor's repository.