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CVE-2017-7889

HIGHCVSS 7.8/10EPSS 0.31%

Last modified

CVE-2017-7889 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.31%

22.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel< 3.2.91
LinuxLinux Kernel>= 3.3, < 3.10.107
LinuxLinux Kernel>= 3.11, < 3.12.74
LinuxLinux Kernel>= 3.13, < 3.16.46
LinuxLinux Kernel>= 3.17, < 3.18.50
LinuxLinux Kernel>= 3.19, < 4.1.41
LinuxLinux Kernel>= 4.2, < 4.4.63
LinuxLinux Kernel>= 4.5, < 4.9.24
LinuxLinux Kernel>= 4.10, < 4.10.12
DebianDebian Linux8.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-7889?
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.
How severe is CVE-2017-7889?
CVE-2017-7889 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2017-7889?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST