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Back to active CVEs
Medium · CVSS 6.5CVE-2026-85231

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

Answer in brief

CVE-2026-85231 records a Medium severity (CVSS 6.5) vulnerability in Libtirpc: libtirpc: denial of service via unbounded memory allocation during rpcsec_gss decoding. The current sources do not mark it as known exploited. The current feed maps Red Hat/libtirpc (generic), Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 16, 2026Updated Oct 16, 2026Source checked Oct 16, 2026First seen by HOL Oct 16, 2026Material review Oct 16, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/libtirpc (generic), Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/libtirpcgeneric*Not reported
Red Hat/openshift/ose-rhel-coreos-8generic*Not reported
Red Hat/openshift/ose-rhel-coreos-9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/libtirpc, Red Hat/openshift/ose-rhel-coreos-8, Red Hat/openshift/ose-rhel-coreos-9.
  2. 2Review the reported fix. Source-reported workaround: To reduce exposure, disable RPCSEC_GSS integrity or privacy modes on externally reachable RPC services where feasible. Implement strict request or transport record size limits in the embedding RPC service before wrapped blob decoding. Additionally, consider using process memory limits or supervision to contain single-process memory exhaustion.

Evidence timeline and material changes

  1. Published upstream

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 16, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Libtirpc: libtirpc: denial of service via unbounded memory allocation during portmapper response decodingSame red hat/libtirpc package
  • Nfs-utils: nfs-utils: denial of service via assertion failure in fsiddSame red hat/openshift/ose-rhel-coreos-8 package
  • IBM i is Affected By An Improper Privilege Management VulnerabilitySame generic ecosystem
  • IBM i is Affected by a Denial of Service in Digital Certificate ManagerSame generic ecosystem
  • IBM Db2 Genius Hub Improper verification of cryptographic signatureSame generic ecosystem
  • WIMOOR through commit ec86736 Authentication Bypass via Forged X-USERINFO HeaderSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-770
Source
CVE List V5
Source checked
Oct 16, 2026
References
2 linked sources
Open source record