A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux Kernel
OSLinux5.114.3 – 4.9.253 (excl.)4.10 – 4.14.217 (excl.)4.15 – 4.19.170 (excl.)4.20 – 5.4.92 (excl.)5.5 – 5.10.10 (excl.)
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PATCH AVAILABLE
Vendor update available. Deploy in standard maintenance cycle.
Tags
DoS
References
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