[USN-5376-5] Git regression

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Ubuntu Security Notice USN-5376-5
February 27, 2026

git regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

USN-5376-4 introduced a regression in Git

Software Description:
- git: fast, scalable, distributed revision control system

Details:

USN-5376-4 fixed a regression in Git. The update introduced a regression
when specifying configuration includes due to additional restrictions. This
update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

俞晨东 discovered that Git incorrectly handled certain repository paths
in platforms with multiple users support. An attacker could possibly use
this issue to run arbitrary commands.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
git 1:2.34.1-1ubuntu1.17

Ubuntu 20.04 LTS
git 1:2.25.1-1ubuntu3.14+esm5
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5376-5
https://ubuntu.com/security/notices/USN-5376-4
https://ubuntu.com/security/notices/USN-5376-3
https://ubuntu.com/security/notices/USN-5376-2
https://ubuntu.com/security/notices/USN-5376-1
https://launchpad.net/bugs/2142790

Package Information:
https://launchpad.net/ubuntu/+source/git/1:2.34.1-1ubuntu1.17