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CVE-2017-7889

HIGH
7.8
CVSS Score
Published: April 17, 2017 at 12:00 AM UTC
Updated: June 17, 2026 at 01:25 AM UTC
3 products affected across 3 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.0414.04
Debian Linux· Debiandrupal
95%
8.0
Linux Kernel· Linux
95%
v < 3.2.913.11 ≤ v < 3.12.743.13 ≤ v < 3.16.463.17 ≤ v < 3.18.503.19 ≤ v < 4.1.413.3 ≤ v < 3.10.1074.10 ≤ v < 4.10.124.2 ≤ v < 4.4.634.5 ≤ v < 4.9.24
Affected range stops below 3.10.107, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.12.74, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.16.46, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.18.50, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.91, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.41, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.10.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.63, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.24, so it looks safe — our inference, not a vendor statement

References (12)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409de94
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
http://www.debian.org/security/2017/dsa-3945
x_refsource_MISCMailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2017/04/16/4
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/97690
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2017:1842
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2017:2077
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2017:2669
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2018:1854

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-732

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