High (8.4) in Linux Kernel. In CISA KEV since 2022-09-15. EPSS 48% chance of exploitation in the next 30 days.
The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call.
Severity
CVSS 3.1
8.4 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
48% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)