Tracker / CVE-2021-47294
CVE-2021-47294
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: netrom: Decrease sock refcount when sock timers expire Commit 63346650c1a9 ("netrom: switch to sock timer API") switched to use sock timer API. It replaces mod_timer() by sk_reset_timer(), and del_timer() by sk_stop_timer(). Function sk_reset_timer() will increase the refcount of sock if it is called on an inactive timer, hence, in case the timer expires, we need to decrease the refcount ourselves in the handler, otherwise, the sock refcount will be unbalanced and the sock will never be freed.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.14.98 → 4.14.241 |
| linux | linux_kernel · 4.19.20 → 4.19.199 |
| linux | linux_kernel · 4.4.173 → 4.4.277 |
| linux | linux_kernel · 4.9.155 → 4.9.277 |
| linux | linux_kernel · 5.0 → 5.4.136 |
| linux | linux_kernel · 5.11 → 5.13.6 |
| linux | linux_kernel · 5.5 → 5.10.54 |
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.