CVE-2023-6780: Fedoraproject Fedora

Medium severity, CVSS 5.3. EPSS: 2.7% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 38 only; version 39 only
• GNU Glibc: from 2.37, before 2.39 (fixed in 2.39)

Published 2024-01-31. Last modified 2026-06-17.