CVE-2017-7518

Name: CVE-2017-7518
Creator: NVD / NIST
Published: 2018-07-30T15:29:00.56+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.70%

Last modified Jun 17, 2026

CVE-2017-7518 is a vulnerability of currently unknown severity. A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.

Metrics

EPSS Probability

0.70%

48.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.4
Redhat	Enterprise Linux Server Eus	7.4
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Workstation	7.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Linux	Linux Kernel	< 4.12

References

http://www.openwall.com/lists/oss-security/2017/06/23/5Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/99263Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038782Third Party Advisory, VDB Entry
https://access.redhat.com/articles/3290921Permissions Required, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0395Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0412Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/3619-1/Third Party Advisory
https://usn.ubuntu.com/3619-2/Third Party Advisory
https://usn.ubuntu.com/3754-1/Third Party Advisory
https://www.debian.org/security/2017/dsa-3981Third Party Advisory
https://www.spinics.net/lists/kvm/msg151817.htmlMailing List, Patch
http://www.openwall.com/lists/oss-security/2017/06/23/5Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/99263Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038782Third Party Advisory, VDB Entry
https://access.redhat.com/articles/3290921Permissions Required, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0395Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0412Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/3619-1/Third Party Advisory
https://usn.ubuntu.com/3619-2/Third Party Advisory
https://usn.ubuntu.com/3754-1/Third Party Advisory
https://www.debian.org/security/2017/dsa-3981Third Party Advisory
https://www.spinics.net/lists/kvm/msg151817.htmlMailing List, Patch

Timeline

Published: Jul 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7518?

How severe is CVE-2017-7518?

Severity scoring for CVE-2017-7518 is pending analysis. The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7518?

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.

Are you affected by CVE-2017-7518?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST