CVE-2023-32629
First published: Wed Jul 26 2023(Updated: )
Last updated 25 April 2025
Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu | =23.04 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.25-1 |
Remedy
If not needed, disable the ability for unprivileged users to create namespaces. To do this temporarily, do: sudo sysctl -w kernel.unprivileged_userns_clone=0 To disable across reboots, do: echo kernel.unprivileged_userns_clone=0 | \ sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf
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Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32629
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140920.html
- https://wiz.io/blog/ubuntu-overlayfs-vulnerability
- https://ubuntu.com/security/notices/USN-6250-1
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
- https://launchpad.net/bugs/cve/CVE-2023-32629
- https://nvd.nist.gov/vuln/detail/CVE-2023-32629
- https://security-tracker.debian.org/tracker/CVE-2023-32629
- https://ubuntu.com/security/CVE-2023-32629
Frequently Asked Questions
What is CVE-2023-32629?
CVE-2023-32629 is a local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels.
How severe is CVE-2023-32629?
CVE-2023-32629 has a severity rating of 7.8, which is considered high.
Which software versions are affected by CVE-2023-32629?
Ubuntu Linux version 23.04, Ubuntu Linux version 5.4.0-155.172 to version 6.2.0-26.26, and various other Ubuntu kernel versions are affected by CVE-2023-32629.
How can I fix CVE-2023-32629?
To fix CVE-2023-32629, update your Ubuntu kernel to the appropriate fixed version provided by Ubuntu or apply the necessary patches.
Where can I find more information about CVE-2023-32629?
You can find more information about CVE-2023-32629 on the MITRE CVE website, the Ubuntu kernel team mailing list, and the Ubuntu security notices.
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