Dashboard / CVE-2023-43786

CVE-2023-43786

MEDIUM 1 PoC
MEDIUM Priority: 0.03 BB Relevance: 46/100
Published: 2023-10-10 Modified: 2026-11-07 First seen: 2026-11-07 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: Unchanged
C: None
I: None
A: High

Description

A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.

Weakness Classification (2)

Affected Software (5)

VendorProductVersion
— — 0 < 3.5.17
fedoraproject fedora 38
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
x.org libx11 < 1.8.7

References & Advisories (8)

https://access.redhat.com/errata/RHSA-2024:2145
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:2973
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2242253
issue-tracking x_refsource_REDHAT

Proof of Concept (1)

—
https://github.com/jfrog/jfrog-CVE-2023-43786-libX11_DoS
nomi-sec

Bug Bounty Relevance

46 / 100
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.47%
Raw Score 0.004750
Percentile 41.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00475
2026-11-12
0.00475
2026-11-10
0.00475
2026-11-09
0.00475
2026-11-08
0.00475
2026-11-07
0.00475
2026-11-06
0.00475

Intelligence Sources

mitre ref →
nvd ref →

External Links