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high8.1

CVE-2018-18559

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.

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 3.2.95 before 3.2.100
from 3.14.58 before 3.15
from 3.18.25 before 3.18.88
from 4.1.14 before 4.1.49
from 4.2.7 before 4.3
from 4.3.1 before 4.4.106
RedhatOpenshift Container Platform
Version 3.11
RedhatVirtualization Host
Version 4.0
RedhatEnterprise Linux Desktop
Version 7.0
RedhatEnterprise Linux Server
Version 7.0
RedhatEnterprise Linux Server Aus
Version 7.6
RedhatEnterprise Linux Server Eus
Version 7.6
RedhatEnterprise Linux Server Tus
Version 7.6
RedhatEnterprise Linux Workstation
Version 7.0

Weakness classification

CWE-362CWE-416

References