What is CVE-2020-29260?

CVE-2020-29260 is a high-severity vulnerability in Libvncserver Project, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-09-02.

How severe is CVE-2020-29260?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-29260 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Libvncserver Project

CVE-2020-29260

libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup().

Vulnerability class: DoS (Denial of Service)

Published 2022-09-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Libvncserver Project — versions 0.9.13
Debian Linux — versions 10.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2020-29260

References

github.com/LibVNC/libvncserver/commit/bef41f6ec4097a8ee094f90a1b34a708fbd757ec (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/09/msg00035.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-29260?: CVE-2020-29260 is a high-severity vulnerability in Libvncserver Project, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-09-02.
How severe is CVE-2020-29260?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-29260 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.