CVE-2023-6780

What it is

An integer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. This issue affects glibc 2.37 and newer.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.7% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2024-01-31 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 06:51 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.7% in the next 30 days (EPSS).
• Severity: 5.3 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2024-01-31 14:15 UTC

Last modified

2026-06-17 06:51 UTC

Exploit probability

2.7% · EPSS, next 30 days

Weakness

CWE-131

Record status

Modified

Affected

• Gnu Glibc < 2.39
• Fedoraproject Fedora 38
• Fedoraproject Fedora 39

Attack profile CVSS 3.1 · 5.3

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-6780.md and follow it. Check whether this project is affected by CVE-2023-6780. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge