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Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.9%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 4.4
References
Products affected by CVE-2020-12826


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