CVEvulnerability

CVE-2023-2235

7.8 HIGH Published 2023-05-01 Modified 2026-08-07 Official page ↗
Status
Modified
Published
2023-05-01
Last modified
2026-08-07
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

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.

Affected configurations

• linux linux kernel (>= 5.13 < 5.15.104) • linux linux kernel (>= 5.16 < 6.1.21) • linux linux kernel (>= 6.2 < 6.2.8)

Related

Weakness · CWE (1)

References