CVE-2026-16277

A stack-based buffer overflow was found in rpcbind's rpcinfo utility. When querying a remote rpcbind service with rpcinfo -l, address information returned by the server is copied into a fixed-size buffer without sufficient bounds checking. A malicious or compromised rpcbind server could use this flaw to crash the rpcinfo client, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

We rate the flaw as Moderate because exploitation requires a user or administrator to actively run rpcinfo -l against a malicious or compromised rpcbind endpoint (UI:R) — it cannot be triggered without that action. The demonstrated impact is limited to a crash of the rpcinfo client process; confidentiality and integrity are not affected, and no reliable code execution has been established.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, avoid using the rpcinfo -l command against untrusted, attacker-controlled, or compromised rpcbind hosts. Restrict the use of the rpcinfo utility to trusted internal endpoints or secure test environments only.