What is the CVSS score of CVE-2023-6377?

CVE-2023-6377 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of Enterprise Linux Eus are affected by CVE-2023-6377?

Organizations using A flaw face notable risk from CVE-2023-6377, a out-of-bounds read vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2023-6377?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Enterprise Linux Eus CVE-2023-6377

HIGH

Out-of-bounds Read (CWE-125)

2023-12-13 secalert@redhat.com

Information Disclosure Buffer Overflow RCE Privilege Escalation Enterprise Linux Eus Debian Linux X Server Xwayland Tigervnc

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 24, 2026 - 12:22 vuln.today

Patch released

Mar 24, 2026 - 12:22 nvd

Patch available

CVE Published

Dec 13, 2023 - 07:15 nvd

HIGH 7.8

DescriptionNVD

A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved.

AnalysisAI

A flaw was found in xorg-server. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved. Affected products include: Redhat Enterprise Linux Eus, Debian Debian Linux, X.Org X Server, X.Org Xwayland, Tigervnc.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.