PT-2017-3771 · Linux+3 · Linux Kernel+3
Published
2017-11-28
·
Updated
2023-05-16
·
CVE-2018-18559
CVSS v3.1
8.1
High
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.20
Description
A use-after-free issue exists in the Linux kernel due to a race condition between fanout add from setsockopt and bind on an AF PACKET socket. This occurs because of an incomplete fix for a race condition, which mishandles a certain multithreaded case involving a packet do bind unregister action followed by a packet notifier register action. The issue allows an attacker to achieve Program Counter control. The vulnerability is related to errors in synchronization when using a shared resource, which can be exploited by a remote attacker to impact the confidentiality, integrity, and availability of protected information.
Recommendations
For Linux kernel versions prior to 4.20, update to a version that includes the complete fix for the race condition to resolve the issue.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
Use After Free
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Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat