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[USN-8824-1] libpcap vulnerability

Posted on 25 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8824-1
September 25, 2026

libpcap vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Applications using libpcap could be made to crash if given specially
crafted data.

Software Description:
- libpcap: Library for for user-level network packet capture

Details:

It was discovered that libpcap did not properly validate BPF instructions
in some situation. An attacker could possibly use this issue to perform out
of bound memory operations.

Update instructions:

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

Ubuntu 26.04 LTS
libpcap0.8t64 1.10.6-1ubuntu1.1

Ubuntu 24.04 LTS
libpcap0.8t64 1.10.4-4.1ubuntu3.1

Ubuntu 22.04 LTS
libpcap0.8 1.10.1-4ubuntu1.22.04.2

Ubuntu 20.04 LTS
libpcap0.8 1.9.1-3ubuntu1.20.04.1+esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libpcap0.8 1.8.1-6ubuntu1.18.04.2+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libpcap0.8 1.7.4-2ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 14.04 LTS
libpcap0.8 1.5.3-2ubuntu0.1+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8824-1
CVE-2026-0799

Package Information:
https://launchpad.net/ubuntu/+source/libpcap/1.10.6-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libpcap/1.10.4-4.1ubuntu3.1
https://launchpad.net/ubuntu/+source/libpcap/1.10.1-4ubuntu1.22.04.2

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