CVE-2023-6200

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

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.

Remediation

Workaround:

  • The remote attack is potentially possible in the local network only. It is not possible if param net.ipv6.conf.[NIC].accept_ra disabled. Check this param value with the command cat /proc/sys/net/ipv6/conf/default/accept_ra or /proc/sys/net/ipv6/conf/eth0/accept_ra (where eth0 is the name of the networking interface). If you cannot run this or a similar command and parameter accept_ra is not available, then IPV6 is disabled. If IPV6 is not being used, it is possible to disable it completely, and there is instruction on how to do this: https://access.redhat.com/solutions/8709

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.68% Top 30%
Third-Party Advisory redhat.com
Affected: n/a kernel
Affected: n/a kernel
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Virtualization 4
Affected: Fedora Fedora
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2023-6200 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2250377 patch issue tracking
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dade3f6a1e4e patch mailing list

Frequently Asked Questions

What is the severity of CVE-2023-6200?
CVE-2023-6200 has been scored as a high severity vulnerability.
How to fix CVE-2023-6200?
As a workaround for remediating CVE-2023-6200: The remote attack is potentially possible in the local network only. It is not possible if param net.ipv6.conf.[NIC].accept_ra disabled. Check this param value with the command cat /proc/sys/net/ipv6/conf/default/accept_ra or /proc/sys/net/ipv6/conf/eth0/accept_ra (where eth0 is the name of the networking interface). If you cannot run this or a similar command and parameter accept_ra is not available, then IPV6 is disabled. If IPV6 is not being used, it is possible to disable it completely, and there is instruction on how to do this: https://access.redhat.com/solutions/8709
Is CVE-2023-6200 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6200 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6200?
CVE-2023-6200 affects n/a kernel, n/a kernel, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Virtualization 4, Fedora Fedora.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.