CVE-2018-15594: Infoleak

Published Aug 3, 2018
·
Updated

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.

Other sources

It was found that arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 It was found that paravirtpatchcall/jump() functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandle certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests.

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5800dc5c19f34e6e03b5adab1282535cb102fafd

— Red Hat

It was found that paravirtpatchcall/jump() functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests.

Affected Software

10 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1062.rt56.1022.el7
0:3.10.0-1062.rt56.1022.el7
redhat/kernel<0:3.10.0-1062.el7
0:3.10.0-1062.el7
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Linux Linux kernel<4.18.1
debian/linux
6.1.176-16.1.187-16.12.107-16.12.111-17.2.9-17.2.10-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.rt56.1022.el7
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.el7
  3. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.187-1Fixed in 6.12.107-1Fixed in 6.12.111-1Fixed in 7.2.9-1Fixed in 7.2.10-1
  4. Upgrade

    Upgrade linux kernel (arch/x86/kernel/paravirt.c) to a version that resolves this vulnerability.

    Fixed in 4.18.1

Event History

Aug 3, 2018
CVE Published
12:00 AM
Aug 20, 2018
CVE Published
via MITRE·08:00 AM
Data Sourced
via MITRE·08:00 AM
Description
Data Sourced
via NVD·08:29 AM
RemedyDescriptionSeverityWeaknessAffected Software
Aug 23, 2018
Data Sourced
via Red Hat·07:32 AM
DescriptionSeverityAffected Software
Jan 11, 2024
Data Sourced
via Launchpad·10:52 PM
Description
Jul 4, 2026
Data Sourced
via Ubuntu·11:03 AM
RemedyDescriptionSeverityAffected Software
Oct 13, 2026
Data Sourced
via Debian·12:54 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the vulnerability ID for this vulnerability?

The vulnerability ID for this vulnerability is CVE-2018-15594.

2

What is the severity of CVE-2018-15594?

CVE-2018-15594 has a severity of medium (5.6).

3

How does CVE-2018-15594 affect the Linux kernel?

CVE-2018-15594 affects the Linux kernel before version 4.18.1.

4

What is the impact of CVE-2018-15594?

CVE-2018-15594 makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests.

5

How do I fix CVE-2018-15594?

To fix CVE-2018-15594, update the Linux kernel to version 4.18.1 or later.

Company

Resources

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