In the Linux kernel, the following vulnerability has been resolved: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.

A flaw was found in the Linux kernel's Security-Enhanced Linux (SELinux) policy handling. A local attacker could exploit this by opening the /sys/fs/selinux/policy file, which prevents other processes from accessing or reading the kernel's security policy. This could lead to a denial of service (DoS) for other system processes that rely on reading the SELinux policy.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-46302 https://nvd.nist.gov/vuln/detail/CVE-2026-46302 https://lore.kernel.org/linux-cve-announce/2026060859-CVE-2026-46302-fd95@gregkh/T