VulnCheck KEV: CVE-2009-2698

The udpsendmsg function in the UDP implementation in 1 net/ipv4/udp.c and 2 net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service NULL pointer dereference and system crash via vectors involving the MSGMORE flag and a UDP socket...

The vulnerability of the `udp_tunnel_nic_netdevice_event()` function in the `net/ipv4/udp_tunnel_nic.c` module of the Linux operating system’s IPv4 protocol implementation allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the udptunnelnicnetdeviceevent function in the net/ipv4/udptunnelnic.c module of the Linux kernel’s IPv4 protocol implementation is related to the distribution of resources without any restrictions or regulation. Exploiting this vulnerability could allow an attacker to...

SUSE CVE-2026-23048

In the Linux kernel, the following vulnerability has been resolved: udp: call skborphan before skbattemptdeferfree Standard UDP receive path does not use skb-destructor. But skmsg layer does use it, since it calls skbsetownersksafe from udpreadskb. This then triggers this warning in...

SUSE CVE-2026-23072

In the Linux kernel, the following vulnerability has been resolved: l2tp: Fix memleak in l2tpudpencaprecv. syzbot reported memleak of struct l2tpsession, l2tptunnel, sock, etc. 0 The cited commit moved down the validation of the protocol version in l2tpudpencaprecv. The new place requires an extr...

SUSE CVE-2026-23083

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by fouudprecv nor "resubmit"-ted in ipprotocoldeliverrcu. Let's forbid 0 for...

SUSE CVE-2026-23095

In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. 0 The repro generated a GUE packet with its inner protocol 0. gueudprecv returns -guehdr-protoctype for "resubmit" in ipprotocoldeliverrcu, but thi...

CVE-2026-23095

In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. 0 The repro generated a GUE packet with its inner protocol 0. gueudprecv returns -guehdr-protoctype for "resubmit" in ipprotocoldeliverrcu, but thi...

CVE-2026-23083

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by fouudprecv nor "resubmit"-ted in ipprotocoldeliverrcu. Let's forbid 0 for...

UBUNTU-CVE-2026-23095

In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. 0 The repro generated a GUE packet with its inner protocol 0. gueudprecv returns -guehdr-protoctype for "resubmit" in ipprotocoldeliverrcu, but thi...

UBUNTU-CVE-2026-23072

In the Linux kernel, the following vulnerability has been resolved: l2tp: Fix memleak in l2tpudpencaprecv. syzbot reported memleak of struct l2tpsession, l2tptunnel, sock, etc. 0 The cited commit moved down the validation of the protocol version in l2tpudpencaprecv. The new place requires an extr...

UBUNTU-CVE-2026-23048

In the Linux kernel, the following vulnerability has been resolved: udp: call skborphan before skbattemptdeferfree Standard UDP receive path does not use skb-destructor. But skmsg layer does use it, since it calls skbsetownersksafe from udpreadskb. This then triggers this warning in...

CVE-2026-23095

CVE-2026-23095 affects the Linux kernel Gue (GUE) path. It describes a skb memory leak when inner IP protocol is 0, triggered by a GUE repro. The issue arises because gue_udp_recv() may propagate a zero protocol, causing a memory leak; the fix drops such packets. The description notes that 0 is a...

EUVD-2026-5447

In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. 0 The repro generated a GUE packet with its inner protocol 0. gueudprecv returns -guehdr-protoctype for "resubmit" in ipprotocoldeliverrcu, but thi...

CVE-2026-23095 gue: Fix skb memleak with inner IP protocol 0.

In the Linux kernel, the following vulnerability has been resolved: gue: Fix skb memleak with inner IP protocol 0. syzbot reported skb memleak below. 0 The repro generated a GUE packet with its inner protocol 0. gueudprecv returns -guehdr-protoctype for "resubmit" in ipprotocoldeliverrcu, but thi...

EUVD-2026-5459

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by fouudprecv nor "resubmit"-ted in ipprotocoldeliverrcu. Let's forbid 0 for...

CVE-2026-23083 fou: Don't allow 0 for FOU_ATTR_IPPROTO.

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by fouudprecv nor "resubmit"-ted in ipprotocoldeliverrcu. Let's forbid 0 for...

CVE-2026-23083

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by fouudprecv nor "resubmit"-ted in ipprotocoldeliverrcu. Let's forbid 0 for...

CVE-2026-23048

The CVE-2026-23048 entry describes a Linux kernel UDP path issue: the standard UDP receive path did not use skb->destructor, while the skmsg layer did via skb_set_owner_sk_safe() in udp_read_skb(), leading to a DEBUG_NET_WARN_ON_ONCE(skb->destructor) in skb_attempt_defer_free(). The documen...

EUVD-2026-5499

In the Linux kernel, the following vulnerability has been resolved: udp: call skborphan before skbattemptdeferfree Standard UDP receive path does not use skb-destructor. But skmsg layer does use it, since it calls skbsetownersksafe from udpreadskb. This then triggers this warning in...

Linux Distros Unpatched Vulnerability : CVE-2026-23083

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fou: Don't allow 0 for FOUATTRIPPROTO. fouudprecv has the same problem mentioned in the previous patch. If FOUATTRIPPROTO is set to 0, skb is not freed by...