Grsecurity problem - modifying "read-only kernel"

Affected: Grsecurityand maybe other linux hardening patchs. Description: Grsecurity and maybe other linux hardening patchs integrates a variant of the patch published in phrack p58-0x07 article supposed to forbid writing to /dev/mem and /dev/kmem by disabling function dowritemem. This is done by...

Protection bypass for linux grsecurity

It's possible to modify kernel memory by using memory mapping...

Grsecurity Kernel Patch 1.9.4 (Linux Kernel) - Memory Protection

Grsecurity Kernel Patch 1.9.4 Linux Kernel - Memory Protection source: https://www.securityfocus.com/bid/4762/info An attacker with root access may be able to write to kernel memory in spite of the security patch provided by grsecurity. The patch operates by redirecting the write system call, whe...

Grsecurity Kernel Patch 1.9.4 (Linux Kernel) - Memory Protection

source: https://www.securityfocus.com/bid/4762/info An attacker with root access may be able to write to kernel memory in spite of the security patch provided by grsecurity. The patch operates by redirecting the write system call, when it is being used to write to a memory device. Unfortunately,...