- Issued:
- 2025-08-12
- Updated:
- 2025-08-12
RHSA-2025:13664 - Moderate: krb5 security update
Synopsis
Moderate: krb5 security update
Type/Severity
Security Advisory Moderate
Topic
An update for krb5 is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).
Security Fix(es):
- krb5: Kerberos RC4-HMAC-MD5 Checksum Vulnerability Enabling Message Spoofing via MD5 Collisions (CVE-2025-3576)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
Affected Products
| Product | Version | Arch |
|---|---|---|
| Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions | 9.4 | x86_64 |
| Red Hat Enterprise Linux for x86_64 - Extended Update Support | 9.4 | x86_64 |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | 9.4 | ppc64le |
| Red Hat Enterprise Linux for IBM z Systems - Extended Update Support | 9.4 | s390x |
| Red Hat Enterprise Linux for IBM z Systems - 4 years of updates | 9.4 | s390x |
| Red Hat Enterprise Linux for ARM 64 - Extended Update Support | 9.4 | aarch64 |
| Red Hat Enterprise Linux for ARM 64 - 4 years of updates | 9.4 | aarch64 |
| Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions | 9.4 | ppc64le |
| Red Hat Enterprise Linux Server - AUS | 9.4 | x86_64 |
Updated Packages
- libkadm5-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-server-ldap-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-devel-1.21.1-2.el9_4.2.i686.rpm
- krb5-1.21.1-2.el9_4.2.src.rpm
- libkadm5-1.21.1-2.el9_4.2.i686.rpm
- krb5-server-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-server-ldap-1.21.1-2.el9_4.2.i686.rpm
- krb5-workstation-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- libkadm5-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-pkinit-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-debugsource-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-pkinit-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-libs-1.21.1-2.el9_4.2.i686.rpm
- krb5-devel-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-libs-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-libs-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-workstation-1.21.1-2.el9_4.2.s390x.rpm
- libkadm5-1.21.1-2.el9_4.2.s390x.rpm
- krb5-server-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-server-ldap-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-debugsource-1.21.1-2.el9_4.2.s390x.rpm
- krb5-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- libkadm5-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-server-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-workstation-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-server-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-pkinit-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-server-1.21.1-2.el9_4.2.i686.rpm
- krb5-debugsource-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-pkinit-1.21.1-2.el9_4.2.s390x.rpm
- krb5-workstation-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- libkadm5-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-debugsource-1.21.1-2.el9_4.2.aarch64.rpm
- libkadm5-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-libs-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-workstation-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- libkadm5-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-server-ldap-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-server-ldap-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-server-ldap-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-workstation-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-server-ldap-1.21.1-2.el9_4.2.s390x.rpm
- krb5-server-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-libs-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-pkinit-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-server-ldap-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-server-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-libs-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-workstation-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-server-ldap-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-libs-debuginfo-1.21.1-2.el9_4.2.i686.rpm
- krb5-pkinit-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-server-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-server-1.21.1-2.el9_4.2.s390x.rpm
- krb5-workstation-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-server-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-libs-1.21.1-2.el9_4.2.s390x.rpm
- krb5-devel-1.21.1-2.el9_4.2.s390x.rpm
- krb5-pkinit-debuginfo-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-server-ldap-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-libs-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-pkinit-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-workstation-debuginfo-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-debuginfo-1.21.1-2.el9_4.2.aarch64.rpm
- krb5-debugsource-1.21.1-2.el9_4.2.i686.rpm
- libkadm5-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-pkinit-1.21.1-2.el9_4.2.i686.rpm
- krb5-libs-1.21.1-2.el9_4.2.x86_64.rpm
- krb5-pkinit-debuginfo-1.21.1-2.el9_4.2.s390x.rpm
- krb5-devel-1.21.1-2.el9_4.2.ppc64le.rpm
- krb5-devel-1.21.1-2.el9_4.2.aarch64.rpm
- libkadm5-1.21.1-2.el9_4.2.x86_64.rpm
Fixes
CVEs
References
Additional information
- The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
- Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.