Vulnerability · CVE-2026-85977
A flaw was found in libtirpc.
Published Oct 16, 2026 · catalog updated Oct 17, 2026 · Red Hat Red Hat Enterprise Linux
Check if you run it
No confirmed exploitation is on record for CVE-2026-85977. EPSS is 0.23%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium5.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.23%
- Remediation
- Advisory link
- Affected products
- Red Hat Red Hat Enterprise Linux
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.
No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.
How to fix CVE-2026-85977
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-85977. EPSS is 0.23%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-1050. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 16, 2026 · Red Hat Security Data
Detected
libtirpc: libtirpc: Denial of Service via unbounded memory allocation during portmapper response decoding
Oct 17, 2026 · NIST NVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2026-85977
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-85977
30-day exploitation probability 0.2%
first.org - NIST NVDVulnerability recordCVE-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 memor
nvd.nist.gov - Red Hat Security DataVendor advisoryCVE-2026-85977
libtirpc: libtirpc: Denial of Service via unbounded memory allocation during portmapper response decoding
access.redhat.com
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.