Tracker / CVE-2024-38580
CVE-2024-38580
High 7.8
In the Linux kernel, the following vulnerability has been resolved: epoll: be better about file lifetimes epoll can call out to vfs_poll() with a file pointer that may race with the last 'fput()'. That would make f_count go down to zero, and while the ep->mtx locking means that the resulting file pointer tear-down will be blocked until the poll returns, it means that f_count is already dead, and any use of it won't actually get a reference to the file any more: it's dead regardless. Make sure we have a valid ref on the file pointer before we call down to vfs_poll() from the epoll routines.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · … → 5.15.161 |
| linux | linux_kernel · 5.16 → 6.1.93 |
| linux | linux_kernel · 6.2 → 6.6.33 |
| linux | linux_kernel · 6.7 → 6.8.12 |
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.