PoC Index

CVE-2023-2235

HIGH 7.8EPSS 0.3%

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.

CVSS v3.1
7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1
7.8 HIGHCVSS: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, 16th percentile
Published
2023-05-01
Updated
2026-08-07

Proof-of-concept exploits (1)

References

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