Tracker / CVE-2025-21655
CVE-2025-21655
High 7.8
In the Linux kernel, the following vulnerability has been resolved: io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period io_eventfd_do_signal() is invoked from an RCU callback, but when dropping the reference to the io_ev_fd, it calls io_eventfd_free() directly if the refcount drops to zero. This isn't correct, as any potential freeing of the io_ev_fd should be deferred another RCU grace period. Just call io_eventfd_put() rather than open-code the dec-and-test and free, which will correctly defer it another RCU grace period.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 6.1 → 6.1.125 |
| linux | linux_kernel · 6.2 → 6.6.72 |
| linux | linux_kernel · 6.7 → 6.12.10 |
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.