KRB5 · CVE-2026-112314 · Package
FIX → 1.22.3 ✓ verified
The GSS-RPC client in MIT Kerberos 5 (krb5) does not free the RPC reply verifier between retries. A remote attacker who injects RPC replies with mismatched XIDs or triggers authentication retries can make the client leak memory, causing denial of service.
first public Nov 9, 2026 · 2 sources
Could this affect your app?
Free first check from your website. Connect your repo for the full answer.
Systems running MIT Kerberos 5 GSS-RPC client programs that talk to an RPC server over TCP, where an attacker can inject or trigger replies. Hosts that do not use GSS-RPC client code paths are less exposed. unknown for the exact affected version range, the sources do not say.
Not affected if no-gss-rpc-clients
Who cares gss-rpc, kerberos, krb5, linux
Upgrade to 1.22.3
Upgrade MIT krb5 to 1.22.3 or later (MITKRB5-SA-2026-001), or a distro build that backports it.
clnttcp_call() in lib/rpc/clnt_tcp.c in MIT Kerberos 5 (aka krb5) does not free the RPC reply verifier between retries, which allows remote attackers to cause a denial of service (memory leak in GSS-RPC client programs) by injecting RPC replies with mismatched XIDs or by triggering authentication retries.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Are you affected?
Tell InfraStack what you run. It checks this one, and every next one, against your stack.
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.