CVE-2017-7889

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94 patch third party advisory issue tracking
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409de94 patch third party advisory issue tracking
https://usn.ubuntu.com/3583-2/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2017:2669 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:1854 third party advisory vendor advisory
https://usn.ubuntu.com/3583-1/ third party advisory vendor advisory
http://www.debian.org/security/2017/dsa-3945 third party advisory vendor advisory
http://www.securityfocus.com/bid/97690 third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2017:2077 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2017/04/16/4 patch mailing list third party advisory
https://access.redhat.com/errata/RHSA-2017:1842 third party advisory vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b8f254aa17f720053054c4ecff3920973a83b9d6 third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-7889?
CVE-2017-7889 has been scored as a high severity vulnerability.
How to fix CVE-2017-7889?
To fix CVE-2017-7889, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7889 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7889 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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