CVE-2023-6200
kernel: ICMPv6 Router Advertisement packets, aka Linux TCP/IP Remote Code Execution Vulnerability
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 21, 2023
Updated · July 9, 2026
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.
Statement
To trigger this issue, the attacker must be on the local network, IPV6, and the parameter net.ipv6.conf must be enabled.[NIC].accept_ra enabled. By default, net.ipv6.conf.[NIC].accept_ra is disabled for Red Hat Enterprise Linux. In the default configuration, only local attacks are possible. The bug was introduced upstream by commit 3dec89b14d37 ("net/ipv6: Remove expired routes with a separated list of routes.").
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')