CVE-2023-5941
FreeBSD vulnerability
- Published8 Nov 2023
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
Frequently asked
Is CVE-2023-5941 being actively exploited?
CVE-2023-5941 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.07%.
How severe is CVE-2023-5941?
CVE-2023-5941 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.07% probability of exploitation.
Which products are affected by CVE-2023-5941?
Affected products include FreeBSD.
How do I fix CVE-2023-5941?
Upgrade affected software to a fixed version, for example FreeBSD 13.2 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2023-5941 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.