CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's IPv6 routing functionality, specifically in the handling of suppressed fib6 rules, which can lead to the reuse of a released route. This flaw may allow an attacker to exploit stale routing information, potentially resulting in unauthorized access or denial of service. System administrators and developers managing Linux-based systems should prioritize addressing this issue to mitigate potential security risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule supplies a replacement, fib6_rule_lookup() still sees res.rt6 and returns that stale dst to its caller. A suppressing rule can therefore leak a released route back to rt6_lookup(), and the next put hits rcuref_put_slowpath() from dst_release(). Clear res->rt6 when suppressing the route so suppressed lookups fall through to the null dst instead of reusing the released one.