MEDIUM 5.3 Microsoft

CVE-2020-12826

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.

Microsoft Security Update 2020-May: 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.

Affected Products

References

Published: 2020-05-12 · Source: Microsoft · Feed updated: 2026-08-20
This medium severity vulnerability with a CVSS score of 5.3 was published on 2020-05-12 via Microsoft. Affected: cm1 kernel 5.4.91-3 on CBL Mariner 1.0.
vulnfeed aggregates 11644 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.