What’s Vulnerable › Vulnerabilities

CVE-2026-90029: usb: storage: realtek_cr: fix use-after-free on disconnect

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

Description

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.

Affected products

• Linux: 3.1 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0935e57ede003bbe35de9c5d6a49260999ca0314
• https://git.kernel.org/stable/c/4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc
• https://git.kernel.org/stable/c/524d4257f741cd95eb85e2817c9c890928fcfef7
• https://git.kernel.org/stable/c/7c4e2f964c65dea4ea22386799d5fb10ef1e3e54
• https://git.kernel.org/stable/c/c1e7e35100efffba7c9e1dfa76519d6cd323ba3d
• https://git.kernel.org/stable/c/cae9dbba6adae21a04a3bd045e07b489847ff2c6
• https://git.kernel.org/stable/c/f98c2f119fcd81cfede114d2fd3463a17aed8209

Get alerted when CVE-2026-90029 or the next vulnerability affects your stack