CVE-2025-24528 Integer overflow in Kerberos 5
High 7.1
Published
Updated
Check this codebase for CVE-2025-24528 and fix it if it is affected.
What it is: CVE-2025-24528 is a high-severity vulnerability in MIT Kerberos 5, published on 16 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-24528 in the wild and no public exploit code.
Affected product: MIT Kerberos 5. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-24528/ (Markdown: https://insights.sbomify.com/CVE-2025-24528/index.md)
An authenticated attacker can cause a kadmind daemon crash via integer overflow in Kerberos 5 when incremental propagation is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-24528?
CVE-2025-24528 is a high-severity vulnerability in MIT Kerberos 5, published on 16 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2025-24528?
Linux distribution packages (40)
krb5-devel AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-libs AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-pkinit AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-server AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-server-ldap AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-workstation AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
libkadm5 AlmaLinux:8 | All versions | 1.18.2-31.el8_10 |
krb5-devel AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5-libs AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5-pkinit AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5-server AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5-server-ldap AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5-workstation AlmaLinux:9 | All versions | 1.21.1-6.el9 |
libkadm5 AlmaLinux:9 | All versions | 1.21.1-6.el9 |
krb5 Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-devel Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-devel-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-libs Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-pkinit Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-pkinit-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-server Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-server-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-server-ldap Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-server-ldap-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-workstation Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-workstation-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
libkadm5 Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
libkadm5-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.18.2-31.el8_10 |
krb5-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-devel Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-libs-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-pkinit-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-server-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-server-ldap-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
krb5-workstation-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
libkadm5-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.21.1-6.el9 |
How do I fix CVE-2025-24528?
Upgrade to a fixed version.
Is CVE-2025-24528 being exploited?
There is no known exploitation of CVE-2025-24528 in the wild and no public exploit code.
Sources
Also known as ALSA-2025:2722, ALSA-2025:7067, AZL-74852, AZL-74862, BELL-CVE-2025-24528, CLSA-2025-1742662173 and 23 more.