Libtirpc: libtirpc: denial of service via unbounded memory allocation during rpcsec_gss decoding
CVSS score
6.5
EPSS probability
%0.3
Risk score
0.0
Published
1 d ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%63
Short explanation
A vulnerability in libtirpc allows authenticated remote attackers to cause unbounded memory allocation and a Denial of Service (DoS) by sending oversized wrapped data requests to RPC services configured with RPCSEC_GSS.
Authenticated remote attackers can exploit this flaw to exhaust system resources, causing the targeted service to become unstable or terminate.
What should be done?
- Monitor Red Hat security advisories and guidance
- Apply relevant updates when available
- Review RPCSEC_GSS configurations
Chain of evidence and sources
Kimliği doğrulanmış uzak bir saldırgan, aşırı büyük sarılmış veri istekleri göndererek bu zafiyeti istismar edebilir.
Bu durum sınırsız bellek tahsisine ve Hizmet Engelleme (DoS) durumuna yol açabilir.
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-770
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-85231 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Enterprise Linux 10 | View |
| 2 | Red Hat | Red Hat Enterprise Linux 6 | View |
| 3 | Red Hat | Red Hat Enterprise Linux 7 | View |
| 4 | Red Hat | Red Hat Enterprise Linux 8 | View |
| 5 | Red Hat | Red Hat Enterprise Linux 9 | View |
| 6 | Red Hat | Red Hat Hardened Images | View |
| 7 | Red Hat | Red Hat OpenShift Container Platform 4 | View |
| 8 | debian | libtirpc (sid) | View |
| 9 | debian | libtirpc (forky) | View |
| 10 | debian | libtirpc (trixie) | View |
| 11 | debian | libtirpc (bookworm) | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 6.5 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD |
| 6.5 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-85231 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-85231 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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