SUSE CVE-2026-74656

In the Linux kernel, the following vulnerability has been resolved: ipv4: fix use-after-free in fibnhcupdatemtu fibnhcupdatemtu walks the nexthop exception table under RTNL, but RTNL does not serialize this walk with PMTU exception updates. The walk uses rcudereferenceprotected with a constant tr...

CVE-2026-74656 ipv4: fix use-after-free in fib_nhc_update_mtu()

In the Linux kernel, the following vulnerability has been resolved: ipv4: fix use-after-free in fibnhcupdatemtu fibnhcupdatemtu walks the nexthop exception table under RTNL, but RTNL does not serialize this walk with PMTU exception updates. The walk uses rcudereferenceprotected with a constant tr...

EUVD-2026-64593

In the Linux kernel, the following vulnerability has been resolved: ipv4: fix use-after-free in fibnhcupdatemtu fibnhcupdatemtu walks the nexthop exception table under RTNL, but RTNL does not serialize this walk with PMTU exception updates. The walk uses rcudereferenceprotected with a constant tr...

CVE-2026-74656

A use-after-free vulnerability exists in the Linux kernel's IPv4 networking stack, specifically in the fib_nhc_update_mtu() function. The root cause is a race condition : this function walks the nexthop exception table under RTNL, but RTNL does not serialize the walk with concurrent PMTU exceptio...

CVE-2026-74656 ipv4: fix use-after-free in fib_nhc_update_mtu()

In the Linux kernel, the following vulnerability has been resolved: ipv4: fix use-after-free in fibnhcupdatemtu fibnhcupdatemtu walks the nexthop exception table under RTNL, but RTNL does not serialize this walk with PMTU exception updates. The walk uses rcudereferenceprotected with a constant tr...