CVE-2023-2235
Use-after-free in Linux kernel's Performance Events subsystem
HIGH 7.8EPSS 0.2%
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
- Linux · Linux Kernel
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.25% chance of exploitation in the next 30 days, 15th percentile
- Published
- 2023-05-01
- Updated
- 2026-08-07
Proof-of-concept exploits (1)
- ChristopherPatrickKuntz/bifrost-infrastructure-disclosure0★ · 2026-09-07
Security advisories
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c…
- https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2