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Vma_rw_chk is a small security module for Linux-2.2.19 which prevents most exploits from working by wrapping execve() and checking to see that the caller does not call from a writable memory segment. Since most local (and many remote) exploits call execve() or similar from the stack (and environment, which is also placed on the stack), which is writable, it prevents most standard exploits from working.

Vma_rw_chk is a small security module for Linux-2.2.19 which prevents most exploits from working by wrapping execve() and checking to see that the caller does not call from a writable memory segment. Since most local (and many remote) exploits call execve() or similar from the stack (and environment, which is also placed on the stack), which is writable, it prevents most standard exploits from working.