CVE-2023-32629: High severity Canonical Ubuntu Linux vulnerability

Published Jul 26, 2023
·
Updated

Last updated 23 May 2026

Other sources

Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovlcopyupmetainodedata skip permission checks when calling ovldosetxattr on Ubuntu kernels

Launchpad

Affected Software

2 affected componentsFixes available
Canonical Ubuntu Linux=23.04
debian/linux
5.10.223-15.10.257-16.1.170-36.1.174-16.12.86-16.12.90-27.0.10-17.0.12-2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.257-1Fixed in 6.1.170-3Fixed in 6.1.174-1Fixed in 6.12.86-1Fixed in 6.12.90-2Fixed in 7.0.10-1Fixed in 7.0.12-2
  2. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1
  3. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.257-1
  4. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.170-3
  5. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.174-1
  6. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.12.86-1
  7. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.12.90-2
  8. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 7.0.10-1
  9. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 7.0.12-2
  10. Configuration

    To temporarily disable unprivileged user namespace creation run: sudo sysctl -w kernel.unprivileged_userns_clone=0. To disable across reboots, create a sysctl file: echo kernel.unprivileged_userns_clone=0 | sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf

    Linux kernel kernel.unprivileged_userns_clone = 0

Event History

Jul 26, 2023
CVE Published
via MITRE·01:59 AM
Data Sourced
via MITRE·01:59 AM
DescriptionSeverityWeakness
Jan 12, 2024
Data Sourced
via Launchpad·12:20 AM
Description
May 23, 2026
Data Sourced
via Ubuntu·04:14 AM
RemedyDescriptionSeverityAffected Software
Jun 17, 2026
Data Sourced
via Debian·07:45 PM
DescriptionAffected Software
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Frequently Asked Questions

1

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.

2

How severe is CVE-2023-32629?

CVE-2023-32629 has a severity rating of 7.8, which is considered high.

3

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.

4

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.

5

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.

Contact

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