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.

Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2020-12826. Reason: This candidate is a duplicate of CVE-2020-12826. Notes: All CVE users should reference CVE-2020-12826 instead of this candidate. All references and descriptions in this candidate have been removed to prevent accidental usage