Quick answers
- Is CVE-2026-112316 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-112316 being exploited in the wild.
- How severe is CVE-2026-112316?
- 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-2026-112316?
- No fixed version is recorded yet. Restrict network access to kadmind to trusted hosts, or disable it in favor of the 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-2026-112316 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-112316?
- 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 the kadmin.local server-side command line tool for administration operations if possible.
Technical details
The xdr_krb5_tl_data() function in lib/kadm5/kadm_rpc_xdr.c does not properly release allocated memory when XDR decoding fails, leading to a memory leak in the kadmind process. The vulnerability requires network access and valid Kerberos authentication; it can be exploited by any authenticated client prior to administrative authorization checks, causing unbounded heap memory exhaustion without enabling code execution or data exfiltration.
Affected products
- MIT Kerberos 5
Timeline
- 2026-11-09: disclosed