The Uninitialized Pointer Dereference Vulnerability is a buffer overflow vulnerability in the GNU C Library (glibc). It occurs when a program uses an uninitialized pointer to access memory. This can lead to arbitrary code execution, allowing attackers to inject malicious code into the program.
This vulnerability affects versions of glibc prior to 2.27. The affected version range is: 2.23-2.26.
Check with: grep -qE 'uninitialized pointer dereference' /lib/libc.so.* on Linux systems, or use a tool like AddressSanitizer.
To fix this vulnerability, update to glibc 2.27 or later. On Debian-based systems, run apt-get update && apt-get install libglibc2.27-0. On Red Hat-based systems, run sudo yum update && sudo yum install glibc2.27.