5.9

CVE-2025-3576: krb5 Use of Weak Hash

CVSS: 5.9v3.1MediumDeferred
AliasesSUSE-SU-2025:03227-1SUSE-SU-2025:03270-1SUSE-SU-2025:20719-1
Published 15-04-2025Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2025-3576 is a medium (CVSS 5.9) Use of Weak Hash vulnerability in krb5. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.3% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2026-0233

Timeline

  1. 15-04-2025
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.01 pp

From 0.34% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat17 products
  • krb5< 0:1.21.1-2.el9_4.2 | < 0:1.20.1-9.el9_2.3 | < 0:1.19.1-16.el9_0.4 | < 0:1.18.2-16.el8_6.4 | < 0:1.17-19.el8_2.3 | < 0:1.18.2-9.el8_4.3 | < 0:1.18.2-26.el8_8.5 | < 0:1.21.3-8.el10_0 | < 0:1.21.1-8.el9_6 | < 0:1.18.2-32.el8_10
  • krb5-debuginfo< 0:1.21.1-2.el9_4.2 | < 0:1.20.1-9.el9_2.3 | < 0:1.19.1-16.el9_0.4 | < 0:1.18.2-16.el8_6.4 | < 0:1.17-19.el8_2.3 | < 0:1.18.2-9.el8_4.3 | < 0:1.18.2-26.el8_8.5 | < 0:1.21.3-8.el10_0 | < 0:1.21.1-8.el9_6 | < 0:1.18.2-32.el8_10
  • krb5-debugsource< 0:1.21.1-2.el9_4.2 | < 0:1.20.1-9.el9_2.3 | < 0:1.19.1-16.el9_0.4 | < 0:1.18.2-16.el8_6.4 | < 0:1.17-19.el8_2.3 | < 0:1.18.2-9.el8_4.3 | < 0:1.18.2-26.el8_8.5 | < 0:1.21.3-8.el10_0 | < 0:1.21.1-8.el9_6 | < 0:1.18.2-32.el8_10
  • krb5-devel< 0:1.21.1-2.el9_4.2 | < 0:1.20.1-9.el9_2.3 | < 0:1.19.1-16.el9_0.4 | < 0:1.18.2-16.el8_6.4 | < 0:1.17-19.el8_2.3 | < 0:1.18.2-9.el8_4.3 | < 0:1.18.2-26.el8_8.5 | < 0:1.21.3-8.el10_0 | < 0:1.21.1-8.el9_6 | < 0:1.18.2-32.el8_10
  • krb5-devel-debuginfo< 0:1.18.2-16.el8_6.4 | < 0:1.17-19.el8_2.3 | < 0:1.18.2-9.el8_4.3 | < 0:1.18.2-26.el8_8.5 | < 0:1.18.2-32.el8_10
Suse11 products
  • krb5&distro=SUSE Linux Enterprise Micro 5.1< 1.19.2-150300.25.1
  • krb5&distro=SUSE Linux Enterprise Micro 5.2< 1.19.2-150300.25.1
  • krb5&distro=SUSE Linux Enterprise Micro 5.3< 1.19.2-150400.3.18.1
  • krb5&distro=SUSE Linux Enterprise Micro 5.4< 1.19.2-150400.3.18.1
  • krb5&distro=SUSE Linux Enterprise Micro 5.5< 1.20.1-150500.3.17.1
Debian1 product
  • krb5< 1.20.1-2+deb12u4 | < 1.21.2-1 | < 1.18.3-6+deb11u7
Opensuse1 product
  • krb5&distro=openSUSE Leap 15.6< 1.20.1-150600.11.14.1
Ubuntu1 product
  • krb5< 1.12+dfsg-2ubuntu5.4+esm7 | < 1.13.2+dfsg-5ubuntu2.2+esm7 | < 1.16-2ubuntu0.4+esm5 | < 1.17-6ubuntu4.11 | < 1.19.2-2ubuntu0.7 | < 1.20.1-6ubuntu2.6

5 vendors · 31 products

References

43 links
Show all 43 references