# CVE-2026-112319: MIT Kerberos 5 GSS-RPC unbounded memory allocation in kadmind

Source: https://junglewise.ai/threats/cve-2026-112319-the-gss-rpc-layer-in-mit-kerberos-5-aka-krb5-does-not-enforce  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-09. Updated: 2026-11-09  
License: CC BY 4.0 with a link back

CVE-2026-112319 · Severity: medium · CVSS 6.5 · Published 2026-11-09

MIT Kerberos 5 is authentication software used to control access to networked systems and services. A flaw in its remote administration daemon (kadmind) allows authenticated attackers to exhaust server memory or consume excessive CPU through specially crafted requests, disrupting service availability. While exploitation requires valid Kerberos credentials, it can be leveraged against network-facing administration services.

Technologies: [Mit Kerberos 5](https://junglewise.ai/threats/technologies/kerberos-5). Vendors: [Mit](https://junglewise.ai/threats/vendors/mit).

## Quick answers

**Is CVE-2026-112319 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112319 being exploited in the wild.

**How severe is CVE-2026-112319?** Medium severity, with a CVSS score of 6.5, published 9 November 2026.

**Which products and versions are affected?** MIT Kerberos 5.

**Is there a fix for CVE-2026-112319?** No fixed version is recorded yet. Restrict network access to kadmind to trusted hosts, or disable it in favor of kadmin.local server-side command line tool for administration operations if possible. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-112319 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-112319?** Check whether you run Mit Kerberos 5. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix


Restrict network access to kadmind to trusted hosts, or disable it in favor of kadmin.local server-side command line tool for administration operations if possible.

## Technical details

The GSS-RPC layer in MIT Kerberos 5 fails to enforce size limits on XDR-decoded data, allowing unbounded memory allocations during RPC request processing. An authenticated remote attacker can trigger repeated allocations or memory leaks in kadmind via crafted RPC requests, causing denial of service through memory exhaustion or excessive CPU consumption. The vulnerability requires establishing a valid Kerberos security context but does not permit code execution or data disclosure.

## Affected products

- MIT Kerberos 5

## Timeline

- 2026-11-09: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-112319](https://access.redhat.com/security/cve/CVE-2026-112319)

## Related threats

- [MIT Kerberos 5 denial of service in ASN.1 SEQUENCE OF decoding](https://junglewise.ai/threats/cve-2026-119079-decode-sequence-of-in-lib-krb5-asn-1-asn1-encode-c-in-mit)
- [MIT Kerberos 5 kadmind memory exhaustion in AUTH_GSSAPI](https://junglewise.ai/threats/cve-2026-112323-the-auth-gssapi-handler-in-lib-rpc-svc-auth-gssapi-c-in-mit)
- [MIT Kerberos 5 denial of service in kadmind AUTH_GSSAPI cleanup](https://junglewise.ai/threats/cve-2026-112322-clean-client-in-lib-rpc-svc-auth-gssapi-c-in-mit-kerberos-5-aka)
- [MIT Kerberos memory exhaustion in AUTH_GSSAPI handler](https://junglewise.ai/threats/cve-2026-112321-the-auth-gssapi-handler-in-lib-rpc-svc-auth-gssapi-c-in-mit)
- [MIT Kerberos 5 memory exhaustion via GSS-RPC authentication context leak](https://junglewise.ai/threats/cve-2026-112320-the-gss-rpc-transport-layer-in-mit-kerberos-5-aka-krb5-1-4-and)