SecBoard
Zurück zur CVE-Übersicht

CVE-2025-21655

MEDIUM(4.7)

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Risk Signal Score12/100 — NIEDRIG
  • CVSS 4.7 — Mittel

EPSS-Score

0%

Exploit-Wahrscheinlichkeit (30 Tage)

CVSS Score

4.7

Technische Schwere

Beschreibung

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.

Referenzen