Home / mailings

PDF

[USN-8464-1] LIBNFS vulnerability

Posted on 23 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8464-1
June 23, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

LIBNFS could be made to crash or run programs if it connected to a
specially crafted NFS server.

Software Description:
- libnfs: NFS client library

Details:

It was discovered that LIBNFS incorrectly handled certain string sizes when
connecting to an NFS server. An attacker could use this issue to cause
LIBNFS to crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions:

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

Ubuntu 26.04 LTS
libnfs-utils 5.0.2-1ubuntu1.1
libnfs14 5.0.2-1ubuntu1.1

Ubuntu 25.10
libnfs-utils 5.0.2-1ubuntu0.25.10.1
libnfs14 5.0.2-1ubuntu0.25.10.1

Ubuntu 24.04 LTS
libnfs-utils 5.0.2-1ubuntu0.24.04.1
libnfs14 5.0.2-1ubuntu0.24.04.1

Ubuntu 22.04 LTS
libnfs-utils 4.0.0-1ubuntu0.1
libnfs13 4.0.0-1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-8464-1
CVE-2026-53689

Package Information:
https://launchpad.net/ubuntu/+source/libnfs/5.0.2-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libnfs/5.0.2-1ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/libnfs/5.0.2-1ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/libnfs/4.0.0-1ubuntu0.1

--===============0644515878013924971==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP