CVE-2026-31674: netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ip6trt: reject oversized addrnr in rtmt6check()
Reject rt match rules whose addrnr exceeds IP6TRTHOPS.
rtmt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so malformed rules are rejected before the match logic can use an out-of-range value.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-31674?
CVE-2026-31674 is a high-severity vulnerability due to the potential for denial-of-service attacks if exploited.
How do I fix CVE-2026-31674?
To fix CVE-2026-31674, update your Linux kernel to the latest version that includes the patch for this vulnerability.
What systems are affected by CVE-2026-31674?
CVE-2026-31674 affects the Linux kernel specifically related to the netfilter ip6t_rt component.
What does CVE-2026-31674 expose my system to?
CVE-2026-31674 can expose systems to potential denial-of-service conditions through oversized addrnr in rt_mt6_check().
When was CVE-2026-31674 disclosed?
CVE-2026-31674 was disclosed as part of security updates for the Linux kernel and addressed in the patch release.