The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL pointer dereference attacks, (2) bypass the mmap_min_addr protection mechanism, or (3) defeat address space layout randomization (ASLR).
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.31 (including) |
| Linux_kernel | Linux | 2.6.31-rc1 (including) | 2.6.31-rc1 (including) |
| Linux_kernel | Linux | 2.6.31-rc2 (including) | 2.6.31-rc2 (including) |
| MRG for RHEL-5 | RedHat | kernel-rt-0:2.6.24.7-137.el5rt | * |
| Red Hat Enterprise Linux 3 | RedHat | kernel-0:2.4.21-63.EL | * |
| Red Hat Enterprise Linux 4 | RedHat | kernel-0:2.6.9-89.0.11.EL | * |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-128.4.1.el5 | * |
| Red Hat Enterprise Linux 5.2 Z Stream | RedHat | kernel-0:2.6.18-92.1.35.el5 | * |
| Red Hat Enterprise Linux 5.3.Z - Server Only | RedHat | kernel-0:2.6.18-128.4.1.el5 | * |
| Linux | Ubuntu | hardy | * |
| Linux | Ubuntu | intrepid | * |
| Linux | Ubuntu | jaunty | * |
| Linux | Ubuntu | upstream | * |
| Linux-source-2.6.15 | Ubuntu | upstream | * |