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Vulnerability · Published Jul 20, 2026 · Assigned by redhat

CVE-2026-16277Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()

Medium 6.5

In plain English

A medium-severity stack buffer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 56.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12rpcbindno fix listedDEBIAN-CVE-2026-16277
Debian:13rpcbindno fix listedDEBIAN-CVE-2026-16277
Debian:14rpcbindno fix listedDEBIAN-CVE-2026-16277
Ubuntu:22.04:LTSrpcbindno fix listedUBUNTU-CVE-2026-16277
Ubuntu:24.04:LTSrpcbindno fix listedUBUNTU-CVE-2026-16277
Ubuntu:26.04:LTSrpcbindno fix listedUBUNTU-CVE-2026-16277
Ubuntu:26.10rpcbindno fix listedUBUNTU-CVE-2026-16277

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 5 see references

Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References