[USN-8670-2] curl vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-8670-2
August 25, 2026

curl vulnerability
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

curl could be made to expose sensitive information.

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

USN-8670-1 fixed a vulnerability in curl. This update provides the
corresponding update for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu
22.04 LTS.

Original advisory details:

 Joshua Rogers discovered that curl incorrectly handled reusing
 connections when client certificate settings changed. This could result
 in the wrong client certificates being used, contrary to expectations.

Update instructions:

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

Ubuntu 22.04 LTS
  curl                            7.81.0-1ubuntu1.27
  libcurl3-gnutls                 7.81.0-1ubuntu1.27
  libcurl3-nss                    7.81.0-1ubuntu1.27
  libcurl4                        7.81.0-1ubuntu1.27
  libcurl4-gnutls-dev             7.81.0-1ubuntu1.27
  libcurl4-nss-dev                7.81.0-1ubuntu1.27
  libcurl4-openssl-dev            7.81.0-1ubuntu1.27

Ubuntu 20.04 LTS
  curl                            7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl3-gnutls                 7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl3-nss                    7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl4                        7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl4-gnutls-dev             7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl4-nss-dev                7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro
  libcurl4-openssl-dev            7.68.0-1ubuntu2.25+esm7
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  curl                            7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl3-gnutls                 7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl3-nss                    7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl4                        7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl4-gnutls-dev             7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl4-nss-dev                7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro
  libcurl4-openssl-dev            7.58.0-2ubuntu3.24+esm12
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8670-2
  https://ubuntu.com/security/notices/USN-8670-1
  CVE-2026-8932

Package Information:
  https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.27
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20260825/2c83c945/attachment.sig>