Skip to main content
HIGH

CVE-2025-24528

CVSS v3

7.1

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for krb5.

Set up CVE WatchFree account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • krb5-serverAlmaLinux:9all versions · fixed in 1.21.1-6.el9and 6 other packages
  • krb5-serverAlmaLinux:8all versions · fixed in 1.18.2-31.el8_10and 6 other packages

Vendor advisories

  • CVE-2025-24528 Red Hat Product Security256 products fixed · 9 known affected

    krb5: overflow when calculating ulog block size

    krb5-devel as a component of Red Hat Enterprise Linux 6 · krb5-libs as a component of Red Hat Enterprise Linux 6 · krb5-pkinit-openssl as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:8385 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

  • RHSA-2025:7067 Red Hat Product Security115 products fixed

    Red Hat Security Advisory: krb5 security update

  • RHSA-2025:2789 Red Hat Product Security12 products fixed

    Red Hat Security Advisory: Red Hat build of OpenTelemetry 3.5.0 release

  • RHSA-2025:2722 Red Hat Product Security80 products fixed

    Red Hat Security Advisory: krb5 security update

  • RHSA-2025:1352 Red Hat Product Security45 products fixed

    Red Hat Security Advisory: krb5 security update

Full record on NVD

Description

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H
Published
2026-01-16
Last Modified
2026-04-14

Frequently asked questions

What is CVE-2025-24528?

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

Is CVE-2025-24528 actively exploited?

Active exploitation of CVE-2025-24528 has not been confirmed. Its EPSS score was 0.5% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-24528?

CVE-2025-24528 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H.

Running krb5? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database