CVE-2023-2235: Use-after-free in Linux kernel's Performance Events subsystem
First published: Mon May 01 2023(Updated: )
A flaw in the Linux Kernel found. 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. Reference: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2</a>
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | =6.3-rc1 | |
| Linux Linux kernel | =6.3-rc2 | |
| Linux Linux kernel | >=5.13<6.3 | |
| Linux Linux kernel | >=5.13<5.15.104 | |
| Linux Linux kernel | >=5.16<6.1.21 | |
| Linux Linux kernel | >=6.2<6.2.8 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.6-1 6.12.9-1 |
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Reference Links
- https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2
- https://launchpad.net/bugs/cve/CVE-2023-2235
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2192649
- https://access.redhat.com/errata/RHSA-2023:3705
- https://access.redhat.com/errata/RHSA-2023:3708
- https://access.redhat.com/errata/RHSA-2023:3723
- https://access.redhat.com/errata/RHSA-2023:4137
- https://access.redhat.com/errata/RHSA-2023:4138
- https://access.redhat.com/errata/RHSA-2023:4541
- https://access.redhat.com/errata/RHSA-2023:4517
- https://access.redhat.com/errata/RHSA-2023:5627
- https://bugzilla.redhat.com/show_bug.cgi?id=2192589
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2235
- https://nvd.nist.gov/vuln/detail/CVE-2023-2235
- https://security-tracker.debian.org/tracker/CVE-2023-2235
- https://ubuntu.com/security/CVE-2023-2235
- https://security.netapp.com/advisory/ntap-20230609-0002/
- https://git.kernel.org/linus/fd0815f632c24878e325821943edccc7fde947a2
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