libc stdio buffer overflow

CVE-2023-5941

What is CVE-2023-5941?

In FreeBSD versions 12.4-RELEASE prior to 12.4-RELEASE-p7 and 13.2-RELEASE prior to 13.2-RELEASE-p5, an issue exists in the __sflush() function of the standard I/O library (libc). This function fails to properly update the write space for write-buffered streams when the write(2) system call encounters an error. This flaw can lead to a heap buffer overflow, potentially resulting in data corruption or allowing an attacker to execute arbitrary code at the privilege level of the affected application. Users are advised to apply the necessary patches to mitigate this risk.

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References