CVE-2026-16277 Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()
A stack buffer overflow in the rpcinfo utility allows a malicious server to crash the client, causing denial of service on Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-16277?
CVE-2026-16277 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-121
Which versions are affected by CVE-2026-16277?
How do I fix CVE-2026-16277?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-16277 being exploited?
There is no known exploitation of CVE-2026-16277 in the wild and no public exploit code.
Sources
Also known as AZL-93009, BELL-CVE-2026-16277, DEBIAN-CVE-2026-16277, ECHO-7a2c-85d2-41e3, GHSA-mjwp-v273-38g8, UBUNTU-CVE-2026-16277.