Use After Free Affecting kernel-debug-uki-virt package, versions <0:5.14.0-284.18.1.el9_2
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Test your applications- Snyk ID SNYK-ORACLE9-KERNELDEBUGUKIVIRT-5805192
- published 26 Jul 2023
- disclosed 1 May 2023
Introduced: 1 May 2023
CVE-2023-2235 Open this link in a new tabHow to fix?
Upgrade Oracle:9 kernel-debug-uki-virt to version 0:5.14.0-284.18.1.el9_2 or higher.
This issue was patched in ELSA-2023-3723.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-uki-virt package and not the kernel-debug-uki-virt package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
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.
References
- https://linux.oracle.com/cve/CVE-2023-2235.html
- https://linux.oracle.com/errata/ELSA-2023-3723.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2
- https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2
- https://security.netapp.com/advisory/ntap-20230609-0002/