CVE-2026-68296

A flaw was found in the Linux kernel's Generic Routing Encapsulation GRE tunnel implementation. An issue with how lockless transmission was handled for GRE tunnels with Sequence Number SEQ or Checksum CSUM features could lead to a deadlock. This deadlock occurs when the GRE transmit function...

EUVD-2026-55397

In the Linux kernel, the following vulnerability has been resolved: net: gre: fix lltx regression for GRE tunnels with SEQ/CSUM Before commit 00d066a4d4ed "netdevfeatures: convert NETIFFLLTX to dev-lltx", NETIFFLLTX was set unconditionally in both gretunnelinit and ip6gretnlinitfeatures alongside...

CVE-2026-68296

CVE-2026-68296 refers to a Linux kernel issue where GRE/GRETAP/ip6gre tunnels with SEQ/CSUM could lose lockless TX due to a regression in NETIF_F_LLTX handling. The root cause was that after the 00d066a4d4ed commit, dev->lltx was assigned after the early returns, breaking the unconditional TX ...

SUSE-SU-2026:22866-1 Security update for the Linux Kernel (Live Patch 14 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.35.1 fixes various security issues The following security issues were fixed: - CVE-2026-46120: ip6gre: Use cached t-net in ip6erspanchangelink bsc1267893. - CVE-2026-46173: exit: prevent preemption of oopsing TASKDEAD task bsc1267723....

CVE-2026-46120 ip6_gre: Use cached t->net in ip6erspan_changelink().

In the Linux kernel, the following vulnerability has been resolved: ip6gre: Use cached t-net in ip6erspanchangelink. After commit 5e72ce3e3980 "net: ipv6: Use link netns in newlink of rtnllinkops", ip6erspannewlink correctly resolves the per-netns ip6gre hash via linknet. ip6erspanchangelink was...

CVE-2026-43456 bonding: fix type confusion in bond_setup_by_slave()

In the Linux kernel, the following vulnerability has been resolved: bonding: fix type confusion in bondsetupbyslave kernel BUG at net/core/skbuff.c:2306! Oops: invalid opcode: 0000 1 SMP KASAN NOPTI RIP: 0010:pskbexpandhead+0xa08/0xfe0 net/core/skbuff.c:2306 RSP: 0018:ffffc90004aff760 EFLAGS:...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013197)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013197 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: ensure sane device mtu in tunnels Another syzbot report 1 with no reproducer hints at a bug...

UBUNTU-CVE-2026-23276

In the Linux kernel, the following vulnerability has been resolved: net: add xmit recursion limit to tunnel xmit functions Tunnel xmit functions iptunnelxmit, ip6tunnelxmit lack their own recursion limit. When a bond device in broadcast mode has GRE tap interfaces as slaves, and those GRE tunnels...

CVE-2026-23276 net: add xmit recursion limit to tunnel xmit functions

In the Linux kernel, the following vulnerability has been resolved: net: add xmit recursion limit to tunnel xmit functions Tunnel xmit functions iptunnelxmit, ip6tunnelxmit lack their own recursion limit. When a bond device in broadcast mode has GRE tap interfaces as slaves, and those GRE tunnels...

Linux Distros Unpatched Vulnerability : CVE-2026-23277

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net/sched: teql: fix NULL pointer dereference in iptunnelxmit on TEQL slave xmit teqlmasterxmit calls netdevstartxmitskb, slave to transmit through slave device...

SUSE CVE-2025-71128

In the Linux kernel, the following vulnerability has been resolved: erspan: Initialize optionslen before referencing options. The struct iptunnelinfo has a flexible array member named options that is protected by a countedbyoptionslen attribute. The compiler will use this information to enforce...

CVE-2026-21906

An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart. When PowerMode...

CVE-2026-21906 Junos OS: SRX Series: With GRE performance acceleration enabled, receipt of a specific ICMP packet causes the PFE to crash

An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart. When PowerMode...

CVE-2026-21906 Junos OS: SRX Series: With GRE performance acceleration enabled, receipt of a specific ICMP packet causes the PFE to crash

An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart. When PowerMode...

UBUNTU-CVE-2025-71128

In the Linux kernel, the following vulnerability has been resolved: erspan: Initialize optionslen before referencing options. The struct iptunnelinfo has a flexible array member named options that is protected by a countedbyoptionslen attribute. The compiler will use this information to enforce...

CVE-2025-71128

The CVE impacts the Linux kernel’s GRE ERSPAN handling in ip_tunnel_info. A flaw in the erspan path leaves options_len uninitialized before any access to the flexible array member options, breaking the runtime bounds checks enforced by FORTIFY_SOURCE when GCC 15+ is used. This can trigger a kerne...

CVE-2025-71128

In the Linux kernel, the following vulnerability has been resolved: erspan: Initialize optionslen before referencing options. The struct iptunnelinfo has a flexible array member named options that is protected by a countedbyoptionslen attribute. The compiler will use this information to enforce...

CVE-2025-71128

In the Linux kernel, the following vulnerability has been resolved: erspan: Initialize optionslen before referencing options. The struct iptunnelinfo has a flexible array member named options that is protected by a countedbyoptionslen attribute. The compiler will use this information to enforce...

CVE-2025-71128 erspan: Initialize options_len before referencing options.

In the Linux kernel, the following vulnerability has been resolved: erspan: Initialize optionslen before referencing options. The struct iptunnelinfo has a flexible array member named options that is protected by a countedbyoptionslen attribute. The compiler will use this information to enforce...

SUSE CVE-2022-50816

In the Linux kernel, the following vulnerability has been resolved: ipv6: ensure sane device mtu in tunnels Another syzbot report 1 with no reproducer hints at a bug in ip6gre tunnel dev:ip6gretap0 Since ipv6 mcast code makes sure to read dev-mtu once and applies a sanity check on it see commit...