CVE-2023-6780 - CVE House
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Status published Medium CVE-2023-6780

Glibc: integer overflow in __vsyslog_internal()

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Red Hat would like to thank Qualys Threat Research Unit for reporting this issue.

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Affected Vendor

Affected Software

glibc, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Fedora
Vulnerable Versions:
2.39

Timeline

Official Publish: January 31st, 2024
Last Modified: July 14th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-131

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.