CVE-2023-6200: Kernel: icmpv6 router advertisement packets, aka linux tcp/ip remote code execution vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-28 · updated 2026-06-17
Weakness: CWE-362

Description

A race condition was found in the Linux Kernel. Under certain conditions, an unauthenticated attacker from an adjacent network could send an ICMPv6 router advertisement packet, causing arbitrary code execution.

Affected products

Linux kernel: before 6.7; 6.7-rc1, 6.7-rc2, 6.7-rc3, 6.7-rc4, 6.7-rc5, 6.7-rc6 — fixed in 6.7

How to fix

Upgrade to a fixed version: Linux kernel 6.7. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2023-6200
https://bugzilla.redhat.com/show_bug.cgi?id=2250377
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dade3f6a1e4e
https://access.redhat.com/security/cve/CVE-2023-6200
https://bugzilla.redhat.com/show_bug.cgi?id=2250377
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dade3f6a1e4e

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