CVE-2026-16461 Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list formatting
A stack buffer overflow in rpcinfo allows a malicious RPC endpoint to crash the client, causing denial of service for administrators running rpcinfo -s.
- 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-2026-16461?
CVE-2026-16461 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 21 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. In rpcbdump() short mode (used by `rpcinfo -s`), version numbers from a remote RPCBPROC_DUMP reply are written into a fixed-size stack buffer without bounds checking. A user or administrator who runs `rpcinfo -s` against a malicious or compromised rpcbind endpoint could experience a crash or denial of service of the rpcinfo client.
Weakness: CWE-121
Which versions are affected by CVE-2026-16461?
Linux distribution packages (8)
rpcbind SUSE:Linux Enterprise Server 16.0 | All versions | 1.2.9-160000.2.1 |
rpcbind SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 0.2.3-24.15.1 |
rpcbind SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.2.9-160000.2.1 |
rpcbind SUSE:Linux Micro 6.0 | All versions | 1.2.9-2.1 |
rpcbind SUSE:Linux Micro 6.1 | All versions | 1.2.9-slfo.1.1_2.1 |
rpcbind SUSE:Linux Micro 6.2 | All versions | 1.2.9-160000.2.1 |
rpcbind openSUSE:Leap 16.0 | All versions | 1.2.9-160000.2.1 |
rpcbind openSUSE:Tumbleweed | All versions | 1.2.9-2.1 |
How do I fix CVE-2026-16461?
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-2026-16461 being exploited?
There is no known exploitation of CVE-2026-16461 in the wild and no public exploit code.
Sources
Also known as AZL-93306, BELL-CVE-2026-16461, DEBIAN-CVE-2026-16461, ECHO-6fe1-83be-909a, GHSA-qh7w-564q-qrc7, SUSE-SU-2026:23451-1 and 7 more.