What is CVE-2026-99070?

CVE-2026-99070 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.12 onward and patched in 6.6.160, 6.12.113, 6.18.57 and others. CVE-2026-99070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-99070?

CVE-2026-99070 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-99070?

Yes, CVE-2026-99070 has been patched. Fixed versions include 6.6.160, 6.12.113, 6.18.57 and others. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-99070 actively exploited?

CVE-2026-99070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-99070

In the Linux kernel, the following vulnerability has been resolved: ipv6: do not warn on route notification size race fib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later fills it with rt6_fill_node(). With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. rt6_fill_node() can then legitimately return -EMSGSIZE, so the warning does not prove a sizing bug. Remove the warning. The existing error path still frees the skb and reports the error to listeners.

Package Linux Kernel

Published 2026-10-23

Last modified 2026-10-23

Patch available

Yes

Affected versions

Linux kernel versions 5.12 and later are affected. Fixed in 6.6.160, 6.12.113, 6.18.57, 7.2.11, 7.3 and their respective stable series.

Affected from

≥ 5.12

Fixed in

✓ 6.6.160 6.6.x ✓ 6.12.113 6.12.x ✓ 6.18.57 6.18.x ✓ 7.2.11 7.2.x ✓ 7.3

References

5 total

Frequently asked questions

What is CVE-2026-99070?

CVE-2026-99070 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.12 onward and has been patched in 6.6.160, 6.12.113, 6.18.57 and others. CVE-2026-99070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-99070?

Yes. CVE-2026-99070 has been patched. Fixed versions include 6.6.160, 6.12.113, 6.18.57 and others. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-99070 actively exploited?

No. CVE-2026-99070 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.