CVE-2018-14678

HIGH
7.8
CVSS Score
Published: July 28, 2018 at 06:00 PM UTC
Updated: June 17, 2026 at 01:41 AM UTC
4 products affected across 4 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

Description

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

Affected

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

4.14.21 ≤ v < 4.14.614.15.5 ≤ v < 4.17.13
Affected range stops below 4.14.61, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.17.13, so it looks safe — our inference, not a vendor statement
Xen· Xenwordpress-plugin
95%
v ≤ 4.11.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/104924
VDB Entryx_refsource_SECTRACKThird Party Advisory
http://www.securitytracker.com/id/1041397
Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/3931-1/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/3931-2/
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
https://www.debian.org/security/2018/dsa-4308
x_refsource_MISCMitigationPatchVendor Advisory
https://xenbits.xen.org/xsa/advisory-274.html

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-665

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