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The IPv6 implementation in the Linux kernel before 6.3 has a net/ipv6/route.c max_size threshold that can be consumed easily e.g. leading to a denial of service (network is unreachable errors) when IPv6 packets are sent in a loop via a raw socket.

🗓️ 10 Aug 2024 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

Linux kernel before 6.3 has a route size limit flaw enabling denial of service via looping Internet Protocol version six packets.

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Vulners
Node
microsoftcbl2_kernel_5.15.180.1-1Range<5.15.148.2-2
OR
microsoftcbl2_kernel_5.15.180.1-1Range<5.15.148.2-2
OR
microsoftcbl2_kernel_5.15.147.1-1Range<5.15.147.1-1

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18 Feb 2026 09:32Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.17.5
EPSS0.0094
SSVC
linux kernelroute size limitdenial of serviceprotocol version sixraw socket
1