vulnerability
Red Hat: CVE-2023-2235: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:S/C:C/I:C/A:C) | 2023-05-01 | 2023-06-22 | 2025-01-30 |
Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
2023-05-01
Added
2023-06-22
Modified
2025-01-30
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.
Solution(s)
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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