CVE-2026-23003 ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbvlaninetprepare in ip6tnlrcv Blamed commit did not take care of VLAN encapsulations as spotted by syzbot 1. Use skbvlaninetprepare instead of pskbinetmaypull. 1 BUG: KMSAN: uninit-value in INETECNdecapsulate...

CVE-2026-23003 ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbvlaninetprepare in ip6tnlrcv Blamed commit did not take care of VLAN encapsulations as spotted by syzbot 1. Use skbvlaninetprepare instead of pskbinetmaypull. 1 BUG: KMSAN: uninit-value in INETECNdecapsulate...

EUVD-2026-4621

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbvlaninetprepare in ip6tnlrcv Blamed commit did not take care of VLAN encapsulations as spotted by syzbot 1. Use skbvlaninetprepare instead of pskbinetmaypull. 1 BUG: KMSAN: uninit-value in INETECNdecapsulate...

CVE-2026-23003

CVE-2026-23003 : In the Linux kernel’s IPv6 tunnel receive path (ip6_tunnel, __ip6_tnl_rcv), VLAN encapsulations were not handled correctly due to a failed VLAN-aware pull in the decapsulation path. The fix substitutes skb_vlan_inet_prepare() for pskb_inet_may_pull() to properly accommodate VLAN-...

CVE-2026-23003

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbvlaninetprepare in ip6tnlrcv Blamed commit did not take care of VLAN encapsulations as spotted by syzbot 1. Use skbvlaninetprepare instead of pskbinetmaypull. 1 BUG: KMSAN: uninit-value in INETECNdecapsulate...

Linux Kernel Security Vulnerabilities

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from improper handling of VLAN encapsulation, potentially leading to uninitialized value errors...

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...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000734)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000734 advisory. The skbflowdissect function in net/core/flowdissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service infinite loop via a sma...

CVE-2026-21906

CVE-2026-21906 overview (Junos OS SRX Series) A vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on SRX Series can be triggered by a specific ICMP packet routed through a GRE tunnel when PowerMode IPsec (PMI) and GRE performance acceleration are enabled. An unauthe...

ip6_gre: make ip6gre_header() robust

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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002299)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002299 advisory. Race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel before 4.8.14 allows local users to gain privileges or cause a denial of service...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001984)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001984 advisory. The skbflowdissect function in net/core/flowdissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service infinite loop via a sma...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002346)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002346 advisory. Race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel before 4.8.14 allows local users to gain privileges or cause a denial of service...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002048)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002048 advisory. The skbflowdissect function in net/core/flowdissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service infinite loop via a sma...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001033)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001033 advisory. Race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel before 4.8.14 allows local users to gain privileges or cause a denial of service...

CVE-2023-49062

Katran could disclose non-initialized kernel memory as part of an IP header. The issue was present for IPv4 encapsulation and ICMP v4 Too Big packet generation. After a bpfxdpadjusthead call, Katran code didn’t initialize the Identification field for the IPv4 header, resulting in writing content ...

PT-2026-26114

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the Linux kernel's UDP GRO Generic Receive Offload complete stage. The UDP GRO complete stage incorrectly assumes that the encapsulation flag is zeroed for all packets...

PT-2026-4665

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contained an issue within the ip6 tunnel component where the code did not properly handle VLAN encapsulations. Specifically, the commit responsible did not account for...

PT-2026-6165

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel’s GUE Generic UDP Encapsulation protocol handler contains a memory leak when processing packets with an inner IP protocol of 0. The issue occurs because gue udp recv...

PT-2026-6142

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a memory leak in the l2tp udp encap recv function. The issue was identified by syzbot, which reported a memory leak of structures like l2tp session, l2tp tunnel...