MGASA-2026-0233: krb5 Mageia

Vulnerability summary

MGASA-2026-0233 is a vulnerability in krb5 Mageia with no CVSS score yet.

Timeline

1. 27-06-2026
   PublishedVulnerability first disclosed.
2. 27-06-2026
   Last modifiedVulnerability information updated.

Description

Updated krb5 packages fix security vulnerabilities CVE-2025-3576, 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. CVE-2026-40355, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message. CVE-2026-40356, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.

No weakness data has been published for this record.