IT

Tracker / CVE-2026-63968

CVE-2026-63968

High 7.5

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_select_path() Found while auditing the same pattern Sashiko reported in rt6_fill_node() [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()"). Writers holding tb6_lock can list_del_rcu(&first->fib6_siblings) without waiting for RCU readers; first->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &first->fib6_siblings as its terminator. fib6_purge_rt() always WRITE_ONCE()s first->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal. [1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev

Affected products and versions

linux linux_kernel
linux linux_kernel · 6.1.128 → 6.1.176
linux linux_kernel · 6.11.11 → 6.12
linux linux_kernel · 6.12.2 → 6.12.93
linux linux_kernel · 6.13 → 6.18.35
linux linux_kernel · 6.19 → 7.0.12
linux linux_kernel · 6.6.75 → 6.6.143

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References