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.
Published: 2020-05-12
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2241-1 linux security update
Debian DLA Debian DLA DLA-2241-2 linux security update
EUVD EUVD EUVD-2020-5109 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.
Ubuntu USN Ubuntu USN USN-4367-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4369-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4391-1 Linux kernel vulnerabilities
History

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Canonical Ubuntu Linux
Linux Linux Kernel
Redhat Enterprise Linux Enterprise Mrg Rhel Extras Rt
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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

Reserved: 2020-05-12T00:00:00.000Z

Link: CVE-2020-12826

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

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

Modified: 2024-11-21T05:00:20.960

Link: CVE-2020-12826

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2020-12826 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses