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.
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References
History
No history.
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
Vulnrichment
No data.
NVD
Status : Modified
Published: 2020-05-12T19:15:11.080
Modified: 2024-11-21T05:00:20.960
Link: CVE-2020-12826
Redhat