-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-9d5b9f45ec 2026-03-27 01:16:52.247652+00:00 --------------------------------------------------------------------------------
Name : pyOpenSSL Product : Fedora 43 Version : 26.0.0 Release : 1.fc43 URL : https://pyopenssl.readthedocs.org/ Summary : Python wrapper module around the OpenSSL library Description : High-level wrapper around a subset of the OpenSSL library, includes among others * SSL.Connection objects, wrapping the methods of Python's portable sockets * Callbacks written in Python * Extensive error-handling mechanism, mirroring OpenSSL's error codes -------------------------------------------------------------------------------- Update Information: Update pyOpenSSL to v26.0.0 (security update) Update python-cryptography to v46.0.5 (dependency of pyOpenSSL 26) Update rust-asn1 to 0.22 (dependency of python-cryptography) Update kryoptic to v1.5 (required for rust-asn1 bump to 0.22) The security status of this update is only for pyOpenSSL. -------------------------------------------------------------------------------- ChangeLog: * Wed Mar 18 2026 Jeremy Cline <[email protected]> - 26.0.0-1 - Update to v26.0.0 - Added support for using aws-lc instead of OpenSSL. - Properly raise an error if a DTLS cookie callback returned a cookie longer than DTLS1_COOKIE_LENGTH bytes. Previously this would result in a buffer-overflow. Credit to dark_haxor for reporting the issue. CVE-2026-27459 - Added OpenSSL.SSL.Connection.get_group_name to determine which group name was negotiated. - Context.set_tlsext_servername_callback now handles exceptions raised in the callback by calling sys.excepthook and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. Credit to Leury Castillo for reporting this issue. CVE-2026-27448 * Thu Jan 22 2026 Jeremy Cline <[email protected]> - 25.3.0-1 - Update to 25.3.0 - pyOpenSSL now sets SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER on connections by default, matching CPythonâs behavior. - Added OpenSSL.SSL.Context.clear_mode. - Added OpenSSL.SSL.Context.set_tls13_ciphersuites to set the allowed TLS 1.3 ciphers. - Added OpenSSL.SSL.Connection.set_info_callback * Sat Jan 17 2026 Fedora Release Engineering <[email protected]> - 25.1.0-6 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild -------------------------------------------------------------------------------- References: [ 1 ] Bug #2433650 - python-cryptography-46.0.5 is available https://bugzilla.redhat.com/show_bug.cgi?id=2433650 [ 2 ] Bug #2447727 - pyOpenSSL-26.0.0 is available https://bugzilla.redhat.com/show_bug.cgi?id=2447727 [ 3 ] Bug #2448652 - CVE-2026-27459 pyOpenSSL: DTLS cookie callback buffer overflow [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2448652 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-9d5b9f45ec' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys --------------------------------------------------------------------------------
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