CVE ID:	CVE-2020-12826
Description:	A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Test IDs:	1.3.6.1.4.1.25623.1.1.2.2020.1713
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-12826 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef https://lists.openwall.net/linux-kernel/2020/03/24/1803 https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://usn.ubuntu.com/4367-1/ https://usn.ubuntu.com/4369-1/ https://usn.ubuntu.com/4391-1/