A flaw was found in libtirpc. A remote attacker can exploit this vulnerability by sending specially crafted PMAPPROC_DUMP replies to a client… (CVE-2026-85977)
Description
A vulnerability in libtirpc allows a remote attacker to cause a denial of service by sending specially crafted PMAPPROC_DUMP replies to a client using the pmap_getmaps() function. This leads to unbounded decoding, resulting in excessive memory and CPU usage and crashing the client process.
CVSS v3.1
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libtirpc library contains a flaw where a remote attacker can exploit the PMAPPROC_DUMP replies sent to a client application that uses the pmap_getmaps() function. By crafting these replies maliciously, the attacker triggers unbounded decoding in the client, causing excessive resource consumption (memory and CPU). This resource exhaustion results in a denial of service (DoS) condition for the client process.
Potential Impact
Exploitation of this vulnerability results in a denial of service (DoS) due to resource exhaustion on the client side. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a patch is available, users should consider limiting exposure to untrusted RPC servers or avoid using the vulnerable function against untrusted hosts.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vc3g-5238-rmmw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-85977"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad2aed92cdf04f656454ba2
Added to database: 10/16/2026, 23:10:17 UTC
Last enriched: 10/16/2026, 23:12:27 UTC
Last updated: 10/17/2026, 00:48:08 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.