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.

Weakness classification

• nvd@nist.gov: CWE-190

Primary references

• cve@mitre.org — Issue Tracking, Patch, Third Party Advisory
• cve@mitre.org — Release Notes, Third Party Advisory
• cve@mitre.org — Patch, Third Party Advisory
• cve@mitre.org
• cve@mitre.org
• cve@mitre.org — Exploit, Mailing List, Patch, Third Party Advisory
• cve@mitre.org
• cve@mitre.org — Third Party Advisory
• cve@mitre.org
• cve@mitre.org
• cve@mitre.org — Exploit, Mailing List, Patch, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Patch, Third Party Advisory