CVE-2017-7889 Security feature bypass in n/a

What is CVE-2017-7889?

CVE-2017-7889 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 17 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The mm subsystem in the Linux kernel through 3.2 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c.

Weakness: CWE-732

Which versions are affected by CVE-2017-7889?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

How do I fix CVE-2017-7889?

Apply the vendor's patch.

Is CVE-2017-7889 being exploited?

There is no known exploitation of CVE-2017-7889 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 DEBIAN-CVE-2017-7889, GHSA-p5mv-cxgx-vhg7, UBUNTU-CVE-2017-7889.