Detailed information on the linux kernel v2.4 prior to v2.4.23 local root vulnerability in the do_brk() kernel function. Kernels 2.4.20-18.9, 2.4.22 (vanilla), and 2.4.22 with grsecurity patch are confirmed vulnerable.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32306/do_brk.txt
Source: https://packetstormsecurity.com/files/32306/do_brk.txt.html