high
7.8
CWE
416
Advisory Published
Updated

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 SoftwareAffected VersionHow to fix
Linux Kernel>=5.13<5.15.104
Linux Kernel>=5.16<6.1.21
Linux Kernel>=6.2<6.2.8
Linux Kernel=6.3-rc1
Linux Kernel=6.3-rc2
Linux Kernel>=5.13<6.3
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager<=ISVG 10.0.2

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2

Remedy

https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-2235?

    CVE-2023-2235 is classified as a local privilege escalation vulnerability in the Linux Kernel.

  • How do I fix CVE-2023-2235?

    To fix CVE-2023-2235, update the Linux Kernel to a patched version such as 5.10.223-1 or 6.1.128-1.

  • Which versions of the Linux Kernel are affected by CVE-2023-2235?

    CVE-2023-2235 affects Linux Kernel versions between 5.13 and 6.3, including specific release candidates.

  • What are the potential impacts of exploiting CVE-2023-2235?

    Exploiting CVE-2023-2235 could allow an attacker to gain elevated privileges on the affected system.

  • What software components are affected by CVE-2023-2235?

    CVE-2023-2235 affects IBM Security Verify Governance, Identity Manager software components and virtual appliances, among other Linux Kernel installations.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203