CVE-2025-3576
Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
02 Description
Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.35% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 28.4% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Deferred. NVD last modified this record on 2026-09-01.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-04-15 05:55Z1 YR AGO
- Last updated
- 2026-09-01 11:51Z1 MO AGO
- Reserved
- 2025-04-14
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-328Use of Weak HashBase
- Data version
- 5.2
- Document digest
- ae0bf887d0995cd5f7618fa48e56e97bd67dd45daf824397b7bc2a9ab6bec8a7
05 Affected products
06 References
- access.redhat.comRHSA-2025:11487https://access.redhat.com/errata/RHSA-2025:11487
- access.redhat.comRHSA-2025:13664https://access.redhat.com/errata/RHSA-2025:13664
- access.redhat.comRHSA-2025:13777https://access.redhat.com/errata/RHSA-2025:13777
- access.redhat.comRHSA-2025:15000https://access.redhat.com/errata/RHSA-2025:15000
- access.redhat.comRHSA-2025:15001https://access.redhat.com/errata/RHSA-2025:15001
- access.redhat.comRHSA-2025:15002https://access.redhat.com/errata/RHSA-2025:15002
- access.redhat.comRHSA-2025:15003https://access.redhat.com/errata/RHSA-2025:15003
- access.redhat.comRHSA-2025:15004https://access.redhat.com/errata/RHSA-2025:15004
- access.redhat.comRHSA-2025:8411https://access.redhat.com/errata/RHSA-2025:8411
- access.redhat.comRHSA-2025:9418https://access.redhat.com/errata/RHSA-2025:9418
- access.redhat.comRHSA-2025:9430https://access.redhat.com/errata/RHSA-2025:9430
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-3576
- bugzilla.redhat.comRHBZ#2359465https://bugzilla.redhat.com/show_bug.cgi?id=2359465
- web.mit.eduhttps://web.mit.edu/kerberos/krb5-1.22/krb5-1.22.html
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00047.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-577017.html
07 Fixed in
AlmaLinux 8
- krb5-devel Fixed in 1.18.2-32.el8_10
- krb5-libs Fixed in 1.18.2-32.el8_10
- krb5-pkinit Fixed in 1.18.2-32.el8_10
- krb5-server Fixed in 1.18.2-32.el8_10
- krb5-server-ldap Fixed in 1.18.2-32.el8_10
- krb5-workstation Fixed in 1.18.2-32.el8_10
- libkadm5 Fixed in 1.18.2-32.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- krb5-devel Fixed in 1.21.1-8.el9_6
- krb5-libs Fixed in 1.21.1-8.el9_6
- krb5-pkinit Fixed in 1.21.1-8.el9_6
- krb5-server Fixed in 1.21.1-8.el9_6
- krb5-server-ldap Fixed in 1.21.1-8.el9_6
- krb5-workstation Fixed in 1.21.1-8.el9_6
- libkadm5 Fixed in 1.21.1-8.el9_6
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- krb5-devel Fixed in 1.21.3-8.el10_0
- krb5-libs Fixed in 1.21.3-8.el10_0
- krb5-pkinit Fixed in 1.21.3-8.el10_0
- krb5-server Fixed in 1.21.3-8.el10_0
- krb5-server-ldap Fixed in 1.21.3-8.el10_0
- krb5-workstation Fixed in 1.21.3-8.el10_0
- libkadm5 Fixed in 1.21.3-8.el10_0
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- krb5-devel Fixed in 1.18.2-32.el8_10
- krb5-libs Fixed in 1.18.2-32.el8_10
- krb5-pkinit Fixed in 1.18.2-32.el8_10
- krb5-server Fixed in 1.18.2-32.el8_10
- krb5-server-ldap Fixed in 1.18.2-32.el8_10
- krb5-workstation Fixed in 1.18.2-32.el8_10
- libkadm5 Fixed in 1.18.2-32.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- krb5-devel Fixed in 1.21.1-8.el9_6
- krb5-libs Fixed in 1.21.1-8.el9_6
- krb5-pkinit Fixed in 1.21.1-8.el9_6
- krb5-server Fixed in 1.21.1-8.el9_6
- krb5-server-ldap Fixed in 1.21.1-8.el9_6
- krb5-workstation Fixed in 1.21.1-8.el9_6
- libkadm5 Fixed in 1.21.1-8.el9_6
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- krb5-devel Fixed in 1.21.3-8.el10_0
- krb5-libs Fixed in 1.21.3-8.el10_0
- krb5-pkinit Fixed in 1.21.3-8.el10_0
- krb5-server Fixed in 1.21.3-8.el10_0
- krb5-server-ldap Fixed in 1.21.3-8.el10_0
- krb5-workstation Fixed in 1.21.3-8.el10_0
- libkadm5 Fixed in 1.21.3-8.el10_0
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- krb5 Fixed in 1.20.1-2+deb12u4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- krb5 Fixed in 1.21.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- krb5 Fixed in 1.21.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- krb5 Fixed in 1.17-6ubuntu4.11
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- krb5 Fixed in 1.19.2-2ubuntu0.7
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- krb5 Fixed in 1.20.1-6ubuntu2.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- krb5 Fixed in 1.12+dfsg-2ubuntu5.4+esm7Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- krb5 Fixed in 1.13.2+dfsg-5ubuntu2.2+esm7Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- krb5 Fixed in 1.16-2ubuntu0.4+esm5Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.