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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-05-12T18:58:48

Updated: 2024-08-04T12:04:22.878Z

Reserved: 2020-05-12T00:00:00

Link: CVE-2020-12826

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-05-12T19:15:11.080

Modified: 2021-07-15T19:16:09.750

Link: CVE-2020-12826

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-05-12T05:40:00Z

Links: CVE-2020-12826 - Bugzilla