CVE-2018-7740: Buffer Overflow

Published Mar 7, 2018
·
Updated

The resvmaprelease function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remapfilepages system call.

Affected Software

37 affected componentsFixes available
Linux Linux kernel<=4.15.7
redhat Virtualization Host=4.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
redhat Enterprise Linux Desktop=7.0
redhat Enterprise Linux Server=7.0
redhat Enterprise Linux Workstation=7.0
ubuntu/linux-aws<4.4.0-1039.42
4.4.0-1039.42
ubuntu/linux-lts-xenial<4.4.0-143.169~14.04.2
4.4.0-143.169~14.04.2
ubuntu/linux*
ubuntu/linux<4.4.0-143.169
4.4.0-143.169
ubuntu/linux-aws<4.4.0-1077.87
4.4.0-1077.87
ubuntu/linux-azure<4.15.0-1013.13~16.04.2
4.15.0-1013.13~16.04.2
ubuntu/linux-gcp<4.15.0-1014.14~16.04.1
4.15.0-1014.14~16.04.1
ubuntu/linux-hwe<4.15.0-24.26~16.04.1
4.15.0-24.26~16.04.1
ubuntu/linux-kvm<4.4.0-1041.47
4.4.0-1041.47
ubuntu/linux-raspi2<4.4.0-1104.112
4.4.0-1104.112
ubuntu/linux-snapdragon<4.4.0-1108.113
4.4.0-1108.113
ubuntu/linux-fips<4.4.0-1008.10
4.4.0-1008.10
ubuntu/linux-snapdragon<4.15.0-1053.57
4.15.0-1053.57
ubuntu/linux-azure-fde*
ubuntu/linux-azure-fde-5.15*
ubuntu/linux-gke*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-azure-6.11*
ubuntu/linux-gcp-6.11*
ubuntu/linux-hwe-6.11*
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-raspi-realtime*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.3-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1039.42
  2. Upgrade

    Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0-143.169~14.04.2
  3. Upgrade

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

    Fixed in 4.4.0-143.169
  4. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1077.87
  5. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1013.13~16.04.2
  6. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1014.14~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-24.26~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.4.0-1041.47
  9. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.4.0-1104.112
  10. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.4.0-1108.113
  11. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.4.0-1008.10
  12. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.15.0-1053.57
  13. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.3-1

Event History

Mar 7, 2018
CVE Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·08:00 AM
Data Sourced
via MITRE·08:00 AM
Description
Data Sourced
via NVD·08:29 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·09:11 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2018-7740?

CVE-2018-7740 has a severity rating that can lead to a denial of service, making it a significant concern for affected systems.

2

How do I fix CVE-2018-7740?

To fix CVE-2018-7740, users should update their systems to versions of the Linux kernel beyond 4.15.7 or install the appropriate patches provided by their distribution.

3

Which software is affected by CVE-2018-7740?

CVE-2018-7740 affects various versions of the Linux kernel, Red Hat virtualization host, and specific versions of Ubuntu and Debian Linux.

4

Can CVE-2018-7740 be exploited remotely?

No, CVE-2018-7740 is a local vulnerability that requires local user access to exploit.

5

What are the potential consequences of CVE-2018-7740?

The exploitation of CVE-2018-7740 can lead to a denial of service, potentially crashing the system or causing instability.

Company

Resources

Contact

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