VULNERABILITY INTELLIGENCE

CVE-2023-2235

CVSS score7.8 HIGH
EPSS probability0.25%
CISA KEVNot currently listed
Published2023-05-01
Last modified2026-08-07
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

Weakness classification

  • CWE-416: Use After Free

Primary references