CVE-2023-6780
Glibc: integer overflow in __vsyslog_internal()
MEDIUM 5.3EPSS 2.7%
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
- Fedora · glibc
- CVSS v3.1 NVD
- 5.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS
- 2.69% chance of exploitation in the next 30 days, 86th percentile
- Published
- 2024-01-31
- Updated
- 2026-10-14
Proof-of-concept exploits (2)
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2024/Feb/3
Security advisories
- https://access.redhat.com/security/cve/CVE-2023-6780
- https://security.gentoo.org/glsa/202402-01
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=2254396