CVE-2017-7518

MEDIUM
5.5
CVSS Score
Published: July 30, 2018 at 01:00 PM UTC
Updated: June 17, 2026 at 01:24 AM UTC
9 products affected across 4 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.7%

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.

Affected

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

References (12)

Mailing Listx_refsource_MLISTPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2017/06/23/5
VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/99263
VDB Entryx_refsource_SECTRACKThird Party Advisory
http://www.securitytracker.com/id/1038782
x_refsource_CONFIRMPermissions RequiredThird Party Advisory
https://access.redhat.com/articles/3290921
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:0395
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:0412
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/3619-1/

CVSS

5.5MEDIUMredhat
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-250CWE-755

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