CVE-2026-90029
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.
How to fix
- Linux Linuxf98c2f119fcd81cfede114d2fd3463a17aed8209, 0935e57ede003bbe35de9c5d6a49260999ca0314, c1e7e35100efffba7c9e1dfa76519d6cd323ba3d, 524d4257f741cd95eb85e2817c9c890928fcfef7, 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54, cae9dbba6adae21a04a3bd045e07b489847ff2c6, 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < f98c2f119fcd81cfede114d2fd3463a17aed8209, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < 0935e57ede003bbe35de9c5d6a49260999ca0314, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < c1e7e35100efffba7c9e1dfa76519d6cd323ba3d, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < 524d4257f741cd95eb85e2817c9c890928fcfef7, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < cae9dbba6adae21a04a3bd045e07b489847ff2c6, e931830bb877e2aad9a1be83506f9bdb26c91e4e ≤ v < 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc, 3.1 | f98c2f119fcd81cfede114d2fd3463a17aed8209, 0935e57ede003bbe35de9c5d6a49260999ca0314, c1e7e35100efffba7c9e1dfa76519d6cd323ba3d, 524d4257f741cd95eb85e2817c9c890928fcfef7, 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54, cae9dbba6adae21a04a3bd045e07b489847ff2c6, 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc |
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