Tracker / CVE-2021-47324
CVE-2021-47324
High 8.8
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free in wdt_startup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Affected products and versions
| linux | linux_kernel · … → 4.4.276 |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.240 |
| linux | linux_kernel · 4.15 → 4.19.198 |
| linux | linux_kernel · 4.20 → 5.4.134 |
| linux | linux_kernel · 4.5 → 4.9.276 |
| linux | linux_kernel · 5.11 → 5.12.19 |
| linux | linux_kernel · 5.13 → 5.13.4 |
| linux | linux_kernel · 5.5 → 5.10.52 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.