SELinux Project SELinux is vulnerable to a denial of service, caused by a use-after-free in cilverifyclassperms. By sending a specially-crafted request, a local attacker could exploit this vulnerability to cause a denial of service condition.

SELinux Project SELinux is vulnerable to a denial of service, caused by a heap-based buffer over-read in ebitmapmatchany. By sending a specially-crafted request, a local attacker could exploit this vulnerability to cause a denial of service condition.

SELinux Project SELinux is vulnerable to a denial of service, caused by a use-after-free in cilverifyclassperms. By sending a specially-crafted request, a local attacker could exploit this vulnerability to cause a denial of service condition.

The Ubuntu SELinux initscript before version 1:0.10 used touch to create a lockfile in a world-writable directory. If the OS kernel does not have symlink protections then an attacker can cause a zero byte file to be allocated on any writable filesystem.

selinux-policy when sysctl fs.protectedhardlinks are set to 0 allows local users to cause a denial of service (SSH login prevention) by creating a hardlink to /etc/passwd from a directory named .config, and updating selinux-policy.

Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary file to a context with few restrictions. This only happens when the relabeling process is done, usually when taking SELinux state from disabled to enable (permissive or enforcing). The issue was found in policycoreutils 2.5-11.