high
8.1
CWE
362 416
Advisory Published
Updated

CVE-2018-18559: Race Condition

First published: Mon Oct 22 2018(Updated: )

In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=3.2.95<3.2.100
Linux Linux kernel>=3.14.58<3.15
Linux Linux kernel>=3.18.25<3.18.88
Linux Linux kernel>=4.1.14<4.1.49
Linux Linux kernel>=4.2.7<4.3
Linux Linux kernel>=4.3.1<4.4.106
Linux Linux kernel>=4.5<4.9.70
Linux Linux kernel>=4.10<4.14.7
Redhat Openshift Container Platform=3.11
Redhat Virtualization Host=4.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=7.0

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-18559?

    CVE-2018-18559 is a vulnerability in the Linux kernel that can lead to a use-after-free due to a race condition.

  • What is the severity of CVE-2018-18559?

    The severity of CVE-2018-18559 is high with a CVSS score of 8.1.

  • How does CVE-2018-18559 affect Linux?

    CVE-2018-18559 affects various versions of the Linux kernel.

  • What is the fix for CVE-2018-18559?

    The fix for CVE-2018-18559 can be found in the Linux kernel's commit 15fe076edea787807a7cdc168df832544b58eba6.

  • Are there any references available for CVE-2018-18559?

    Yes, you can find references for CVE-2018-18559 in the SecuriTeam blog, the Linux kernel's commit, and the Red Hat bugzilla.

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