Is CVE-2023-5941 actively exploited?

No active exploitation of CVE-2023-5941 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-5941 be exploited remotely?

Yes. CVE-2023-5941 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-5941?

CVE-2023-5941 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-5941

CRITICAL

CVE-2023-5941

CWE-131Published: November 8, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In versions of FreeBSD 12.4-RELEASE prior to 12.4-RELEASE-p7 and FreeBSD 13.2-RELEASE prior to 13.2-RELEASE-p5 the __sflush() stdio function in libc does not correctly update FILE objects' write space members for write-buffered streams when the write(2) system call returns an error. Depending on the nature of an application that calls libc's stdio functions and the presence of errors returned from the write(2) system call (or an overridden stdio write routine) a heap buffer overflow may occur. Such overflows may lead to data corruption or the execution of arbitrary code at the privilege level of the calling program.

NVD Source

Technical Analysis

CVE-2023-5941 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.