https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-04T12:54:20.462582+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2025-3576 CVE-2025-3576 — Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions 2026-10-04T12:54:20.466504+00:00

Affected: krb5, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.8 Telecommunications Update Service and 20 more

A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.

 https://vulnerability.circl.lu/vuln/usn-7542-1 USN-7542-1 — krb5 vulnerability 2026-10-04T12:54:20.466626+00:00

Affected: Ubuntu:Pro:14.04:LTS: krb5, Ubuntu:Pro:16.04:LTS: krb5, Ubuntu:Pro:18.04:LTS: krb5, Ubuntu:20.04:LTS: krb5, Ubuntu:22.04:LTS: krb5, Ubuntu:24.04:LTS: krb5

It was discovered that Kerberos allowed the usage of weak cryptographic standards. An attacker could possibly use this issue to expose sensitive information.

This update introduces the allow_rc4 and allow_des3 configuration options, and disables the usage of RC4 and 3DES ciphers by default. Users are advised to discontinue their usage and upgrade to stronger encryption protocols. If the use of the insecure RC4 and 3DES algorithms is necessary, they can be enabled with the aforementioned configuration options.