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Vulnerability · Published Oct 16, 2026 · Assigned by redhat

CVE-2026-85231Libtirpc: libtirpc: denial of service via unbounded memory allocation during rpcsec_gss decoding

Medium 6.5

In plain English

A medium-severity resource allocation without limits 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 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 77.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in libtirpc. An authenticated remote attacker could exploit this vulnerability by sending oversized wrapped data requests to an RPC (Remote Procedure Call) service configured with RPCSEC_GSS (Remote Procedure Call Security-Generic Security Service) integrity or privacy. This can lead to unbounded memory allocation, resulting in a Denial of Service (DoS) by exhausting system resources and causing the service to become unstable or terminate.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libtirpcno fix listedDEBIAN-CVE-2026-85231
Debian:13libtirpcno fix listedDEBIAN-CVE-2026-85231
Debian:14libtirpcno fix listedDEBIAN-CVE-2026-85231
Ubuntu:22.04:LTSlibtirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:24.04:LTSlibtirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:26.04:LTSlibtirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:26.10libtirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:22.04:LTSntirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:24.04:LTSntirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:26.04:LTSntirpcno fix listedUBUNTU-CVE-2026-85231
Ubuntu:26.10ntirpcno fix listedUBUNTU-CVE-2026-85231

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Hardened Images see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 5 see references

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References