CVE-2023-2235 — Use-after-free in Linux kernel's Performance Events subsystem
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 ch…
Published: 2023-05-01 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7