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CVE-2018-10853

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Date: September 11, 2018

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.

Language: C

Severity Score

Related Resources (20)

https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
https://access.redhat.com/errata/RHSA-2020:0036
https://access.redhat.com/errata/RHSA-2020:0179
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10853
https://access.redhat.com/errata/RHSA-2019:2029
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c9fa24ca7c9c47605672916491f79e8ccacb9e6
https://nvd.nist.gov/vuln/detail/CVE-2018-10853
https://access.redhat.com/security/cve/CVE-2018-10853
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
https://access.redhat.com/errata/RHSA-2019:2043
https://access.redhat.com/errata/RHSA-2020:0103
https://security-tracker.debian.org/tracker/CVE-2018-10853
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-10853
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
https://usn.ubuntu.com/3777-1/
https://usn.ubuntu.com/3777-2/
https://www.openwall.com/lists/oss-security/2018/09/02/1
https://www.mend.io/vulnerability-database/CVE-2018-10853

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

Improper Privilege Management

CWE-269

Execution with Unnecessary Privileges

CWE-250

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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