CVE-2018-15594

Publication date 20 August 2018

Last updated 4 July 2026

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests.

From the Ubuntu Security Team

It was discovered that the paravirtualization implementation in the Linux kernel did not properly handle some indirect calls, reducing the effectiveness of Spectre v2 mitigations for paravirtual guests. A local attacker could use this to expose sensitive information.

Status

Package Ubuntu Release Status
linux 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-36.39
16.04 LTS xenial
Fixed in 4.4.0-137.163
14.04 LTS trusty
Fixed in 3.13.0-160.210
linux-aws 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1023.23
16.04 LTS xenial
Fixed in 4.4.0-1069.79
14.04 LTS trusty
Fixed in 4.4.0-1031.34
linux-azure 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1025.26
16.04 LTS xenial
Fixed in 4.15.0-1025.26~16.04.1
14.04 LTS trusty
Fixed in 4.15.0-1030.31~14.04.1
linux-azure-edge 18.10 cosmic Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 4.15.0-1025.26
14.04 LTS trusty Not in release
linux-euclid 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-flo 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gcp 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1021.22
16.04 LTS xenial
Fixed in 4.15.0-1021.22~16.04.1
14.04 LTS trusty Not in release
linux-gke 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Not in release
linux-goldfish 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-grouper 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-hwe 18.10 cosmic Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 4.15.0-36.39~16.04.1
14.04 LTS trusty Not in release
linux-hwe-edge 18.10 cosmic Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 4.15.0-36.39~16.04.1
14.04 LTS trusty Not in release
linux-kvm 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1023.23
16.04 LTS xenial
Fixed in 4.4.0-1035.41
14.04 LTS trusty Not in release
linux-lts-trusty 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-utopic 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-vivid 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-wily 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-xenial 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
Fixed in 4.4.0-137.163~14.04.1
linux-maguro 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-mako 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-manta 18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oem 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1021.24
16.04 LTS xenial Ignored end of standard support, was needed
14.04 LTS trusty Not in release
linux-raspi2 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed in 4.15.0-1024.26
16.04 LTS xenial
Fixed in 4.4.0-1098.106
14.04 LTS trusty Not in release
linux-snapdragon 18.10 cosmic Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed in 4.4.0-1102.107
14.04 LTS trusty Not in release

Patch details

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Package Patch details
linux

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.5 · Medium

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-3776-1
    • Linux kernel vulnerabilities
    • 1 October 2018
    • USN-3776-2
    • Linux kernel (Xenial HWE) vulnerabilities
    • 1 October 2018
    • USN-3777-2
    • Linux kernel (HWE) vulnerabilities
    • 1 October 2018
    • USN-3777-1
    • Linux kernel vulnerabilities
    • 1 October 2018
    • USN-3777-3
    • Linux kernel (Azure) vulnerabilities
    • 23 October 2018
    • USN-3775-2
    • Linux kernel (Trusty HWE) vulnerabilities
    • 1 October 2018
    • USN-3775-1
    • Linux kernel vulnerabilities
    • 1 October 2018

Other references

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