CVE-2020-12826 Integer overflow in n/a

What is CVE-2020-12826?

CVE-2020-12826 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 12 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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: CWE-190

Which versions are affected by CVE-2020-12826?

It affects 4 products.

Products include Canonical Ubuntu Linux, Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Mrg.

How do I fix CVE-2020-12826?

Apply the vendor's patch.

Is CVE-2020-12826 being exploited?

There is no known exploitation of CVE-2020-12826 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CVE-2020-10741, DEBIAN-CVE-2020-12826, GHSA-wxmm-482m-cm8h, UBUNTU-CVE-2020-12826.