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Fencer Vulns
medium 6.5

CVE-2026-16277 json

Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()

published 2026-07-20 3 mo ago modified 2026-11-05 3 d ago also EUVD-2026-45950

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

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.

Patch / fix

  • rpcbind Azure Linux 3.0 1.2.9-1

azure linux advisories AZL-93009

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-16277 updated cvss 6.5

rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()

  • Red Hat Enterprise Linux 8 rpcbind, rpcbind 1.2.7-3.el10 Red Hat Enterprise Linux 9 rpcbind, rpcbind 1.2.7-3.el10 Red Hat Enterprise Linux 10 rpcbind 1.2.7-3.el10 Red Hat OpenShift Container Platform 4 rpcbind 1.2.7-3.el10 Red Hat OpenShift Container Platform 5 rpcbind 1.2.7-3.el10
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.