Skip to main content

rpcbind rpcinfo EUVDEUVD-2026-45950

| CVE-2026-16277 MEDIUM
Stack-based Buffer Overflow (CWE-121)
2026-07-20 redhat GHSA-mjwp-v273-38g8
Buffer Overflow Denial Of Service Stack Overflow Red Hat Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Openshift Container Platform 4 Suse Red Hat
6.5
CVSS 3.1 · Vendor: redhat
Share

Severity by source

Vendor (redhat) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

AV:N as rpcinfo queries a remote network server; UI:R required since victim must actively run the command; A:H for client process crash; C:N and I:N as only DoS impact is described.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 20, 2026 - 15:05 vuln.today
CVE Published
Jul 20, 2026 - 14:09 cve.org
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Stack-based buffer overflow in the rpcinfo client utility (part of the rpcbind package) crashes the client process when querying a malicious or compromised rpcbind server using the -l flag. Address data returned by the server is copied into a fixed-size stack buffer without bounds validation (CWE-121), enabling a server-side attacker to trigger a denial of service against any administrator or script that runs rpcinfo -l against their controlled endpoint. No public exploit identified at time of analysis, and no CISA KEV listing; impact is confined to client-side availability with no confidentiality or integrity exposure.

Technical ContextAI

rpcbind is the ONC RPC portmapper daemon - a foundational service on Linux systems enabling RPC-based protocols such as NFS and NIS to register and discover services. The rpcinfo utility communicates with rpcbind services to enumerate registered RPC programs; the -l flag requests address-listing output. CWE-121 (Stack-based Buffer Overflow) identifies the root cause: server-supplied address strings are copied into a statically sized stack buffer in the rpcinfo client without first verifying the data length against the buffer capacity, allowing a malicious server response to overwrite adjacent stack memory. Affected platforms per CPE include rpcbind as shipped with Red Hat Enterprise Linux 8, 9, and 10, and Red Hat OpenShift Container Platform 4. The upstream fix is a committed patch in the linux-nfs.org rpcbind git repository (commit bb9bb7286a4c345442946dc2ce3c9e7f67e96d4d).

RemediationAI

The upstream fix is available as commit bb9bb7286a4c345442946dc2ce3c9e7f67e96d4d in the rpcbind git repository at git.linux-nfs.org (https://git.linux-nfs.org/?p=steved/rpcbind.git;a=commitdiff;h=bb9bb7286a4c345442946dc2ce3c9e7f67e96d4d); however, a released and packaged patched version number has not been confirmed from the available data - monitor Red Hat errata via https://access.redhat.com/security/cve/CVE-2026-16277 for official RHEL 8, 9, 10, and OpenShift 4 package updates and apply them as released. As a compensating control, restrict use of rpcinfo -l to known, trusted internal rpcbind endpoints and avoid running it against external or untrusted hosts; this limits exposure but does not remediate the underlying flaw and may disrupt legitimate RPC inventory workflows. If rpcinfo is invoked by automated scripts or monitoring tooling, audit those scripts to ensure server endpoints are hardcoded to trusted infrastructure rather than dynamically resolved, reducing the risk of a compromised server triggering the overflow.

More in Red Hat Enterprise Linux 10

View all
CVE-2026-18663 MEDIUM
5.9 Aug 12

Heap corruption via double-free in 389-ds-base's LDAP control parsing allows an unauthenticated remote attacker to crash
CVE-2026-4631 CRITICAL POC
9.8 Apr 07

Remote code execution in Cockpit's web interface allows unauthenticated attackers to execute arbitrary commands on the h
CVE-2026-4480 CRITICAL POC
9.0 May 26

Remote code execution in Samba's printing subsystem allows remote attackers to inject arbitrary shell commands via craft
CVE-2026-18922 CRITICAL
9.8 Sep 07

Authentication bypass in 389 Directory Server (shipped as Red Hat Directory Server 11-13 and within RHEL 6-10) lets remo
CVE-2026-14544 CRITICAL
9.8 Jul 03

Remote code execution and privilege escalation in HPLIP (HP Linux Imaging and Printing) affects the hpcups print filter

CVE-2026-76578 CRITICAL
9.8 Sep 07

Unauthenticated privilege escalation in FreeIPA (Red Hat Identity Management) allows a remote attacker to gain genuine a
CVE-2026-5121 HIGH
7.5 Mar 30

Remote code execution in libarchive on 32-bit systems allows unauthenticated attackers to execute arbitrary code via spe
CVE-2026-28369 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow (the embedded web server underpinning JBoss EAP, Red Hat Data Grid, and Apache Camel

CVE-2026-28368 CRITICAL
9.1 Mar 27

HTTP request smuggling in Red Hat Undertow allows remote unauthenticated attackers to bypass front-end security controls
CVE-2026-33845 CRITICAL
9.1 Apr 30

Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an intege
CVE-2026-28367 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow allows remote unauthenticated attackers to send `\r\r\r` as a header block terminator
CVE-2026-16526 HIGH
8.8 Jul 30

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe

Same weakness CWE-121 – Stack-based Buffer Overflow

View all
CVE-2025-0282 CRITICAL POC
9.0
CVE-2025-22457 CRITICAL POC
9.8
CVE-2012-10060 CRITICAL POC
9.3
CVE-2012-10053 CRITICAL POC
9.3
CVE-2013-10064 CRITICAL POC
9.3
CVE-2012-10023 MEDIUM POC
6.9
CVE-2012-10058 CRITICAL POC
10.0
CVE-2013-10068 CRITICAL POC
9.4

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SLES15-SP5-CHOST-BYOS-SAP-CCloud Affected
SLES15-SP6-CHOST-BYOS Affected
SLES15-SP6-CHOST-BYOS-Aliyun Affected
SLES15-SP6-CHOST-BYOS-Azure Affected
SLES15-SP6-CHOST-BYOS-EC2 Affected

Share

EUVD-2026-45950 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy