CVE-2023-43786

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.

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CVSS v3.1

5.5 MEDIUM

EPSS

0.46%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

ScopeUNCHANGED

ConfidentialityNONE

IntegrityNONE

AvailabilityHIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Connections

4 relationships

Timeline

disclosure → media coverage

Oct 10, 2023

Disclosure — published as a CVE record. · last revised by NVD Nov 4, 2025

Public PoC (1)

github.com/jfrog/jfrog-CVE-2023-43786-libX11_DoS

Unverified third-party code — review before executing.