CVE Catalog

CVE-2026-90029

Low risk· EPSS 9%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.19%

9th percentile - higher than 9% of all known CVEs

Summary

In the Linux kernel, the usb: storage: realtek_cr driver has a use-after-free on disconnect. realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed, and the timer callback may still be running and can rearm itself. The fix uses timer_shutdown_sync() and moves timer_setup() into init_realtek_cr().

Risk Assessment

Can lead to use-after-free, kernel crash, or potential code execution during device disconnect. Requires physical access to the hardware.

Recommendation

Update the Linux kernel to a version containing the fix that uses timer_shutdown_sync() and moves timer_setup() into init_realtek_cr(). Avoid disconnecting affected devices until patched.

Related vulnerabilities

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: usb: storage: realtek_cr: fix use-after-free on disconnect realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free. Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed. Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor. Found by static analysis.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS