The vulnerability of the functions ip6tunnel_xmit() (included in net/ip6_tunnel.h) and iptunnel_xmit() (from net/ipv4/ip_tunnel_core.c) in the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the ip6tunnelxmit function included in net/ip6tunnel.h and the iptunnelxmit function in net/ipv4/iptunnelcore.c in the Linux operating system is related to unmanaged recursion. Exploiting this vulnerability could allow an attacker to cause a service failure...

net/sched: teql: fix NULL pointer dereference in iptunnel_xmit on TEQL slave xmit

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UBUNTU-CVE-2026-23277

In the Linux kernel, the following vulnerability has been resolved: net/sched: teql: fix NULL pointer dereference in iptunnelxmit on TEQL slave xmit teqlmasterxmit calls netdevstartxmitskb, slave to transmit through slave devices, but does not update skb-dev to the slave device beforehand. When a...

CVE-2026-23277 net/sched: teql: fix NULL pointer dereference in iptunnel_xmit on TEQL slave xmit

In the Linux kernel, the following vulnerability has been resolved: net/sched: teql: fix NULL pointer dereference in iptunnelxmit on TEQL slave xmit teqlmasterxmit calls netdevstartxmitskb, slave to transmit through slave devices, but does not update skb-dev to the slave device beforehand. When a...

CVE-2024-26804 net: ip_tunnel: prevent perpetual headroom growth

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: prevent perpetual headroom growth syzkaller triggered following kasan splat: BUG: KASAN: use-after-free in skbflowdissect+0x19d1/0x7a50 net/core/flowdissector.c:1170 Read of size 1 at addr ffff88812fb4000e by task...

CVE-2024-26804

CVE-2024-26804 affects the Linux kernel's IP tunnel infrastructure. The issue arises when packets are routed through a GRE tunnel and then encapsulated again (via ip_tunnel_xmit/ipip_tunnel_xmit), causing gre0 and ipip0 to inflate dev->needed_headroom iteratively. The neigh layer pulls skb wit...