Is CVE-2023-43785 in the CISA KEV catalog?

No. CVE-2023-43785 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-43785?

CVE-2023-43785 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-43785?

CVE-2023-43785 has an EPSS score of 0.63% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-43785?

Upgrade libx11 on debian 11 to 2:1.7.2-1+deb11u2 or later. Fixes are available for 17 affected products.

CVE & CISA-KEV Catalog

CVE-2023-43785

MEDIUM

6.5

CVSS v3

NVD

Description

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

CWE-787Out-of-bounds Write CWE-125Out-of-bounds Read

How to fix

Remediation Available

libx11Debian

Fixed in:2:1.7.2-1+deb11u2CVE-2023-43785

Fixed in:2:1.8.4-2+deb12u2CVE-2023-43785

Fixed in:2:1.8.7-1CVE-2023-43785

libX11Red Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11Rocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-commonRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-commonRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-debuginfoRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-debuginfoRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-debugsourceRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-debugsourceRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-develRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-develRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-xcbRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-xcbRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-xcb-debuginfoRocky

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libX11-xcb-debuginfoRed Hat / RHEL

Fixed in:0:1.6.8-8.el8RHSA-2024:2973

Fixed in:0:1.7.0-9.el9RHSA-2024:2145

libx11Ubuntu

Fixed in:2:1.6.2-1ubuntu2.1+esm5USN-6407-2

Fixed in:2:1.6.3-1ubuntu2.2+esm4USN-6407-2

Fixed in:2:1.6.4-3ubuntu0.4+esm2USN-6407-2

Fixed in:2:1.6.9-2ubuntu1.6USN-6407-1

Fixed in:2:1.7.5-1ubuntu0.3USN-6407-1

Fixed in:2:1.8.4-2ubuntu0.3USN-6407-1

libx11-6Ubuntu

Fixed in:2:1.6.2-1ubuntu2.1+esm5USN-6407-2

Fixed in:2:1.6.3-1ubuntu2.2+esm4USN-6407-2

Fixed in:2:1.6.4-3ubuntu0.4+esm2USN-6407-2

Fixed in:2:1.6.9-2ubuntu1.6USN-6407-1

Fixed in:2:1.7.5-1ubuntu0.3USN-6407-1

Fixed in:2:1.8.4-2ubuntu0.3USN-6407-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.63%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Third-Party Advisory2

Other references4

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.