What is CVE-2026-85977?

CVE-2026-85977 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-1050. CVSS score: 5.3/10. Published 2026-10-16.

How severe is CVE-2026-85977?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-85977

A flaw was found in libtirpc. A remote attacker can exploit this vulnerability by sending specially crafted PMAPPROC_DUMP replies to a client application that uses the pmap_getmaps() function against an attacker-controlled host. This unbounded decoding can lead to excessive memory and CPU allocation, causing the client process to experience a Denial of Service (DoS) due to resource exhaustion.

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-1050

References

access.redhat.com/security/cve/CVE-2026-85977 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-85977?: CVE-2026-85977 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-1050. CVSS score: 5.3/10. Published 2026-10-16.
How severe is CVE-2026-85977?: Medium severity. CVSS v3 base score is 5.3 out of 10.