Vulnerability in Linux Kernel
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 12.04, 14.04
- Debian Linux — versions 8.0
Weakness classification (CWE)
References
- github.com/torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94 (Patch, Third Party Advisory, Issue Tracking)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/3583-2/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2669 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1854 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3583-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2017/dsa-3945 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/97690 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:2077 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2017/04/16/4 (Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7889?
- CVE-2017-7889 is a high-severity vulnerability in Linux Kernel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2017-04-17.
- How severe is CVE-2017-7889?
- High severity. CVSS v3 base score is 7.8 out of 10.