CVE-2026-80840

CVE-2026-80840 is a slab-out-of-bounds write in the Linux kernel IPv6 Segment Routing (seg6) code. When End.DX4 or End.DT4 decapsulates an inner IPv4 packet via decap_and_validate(), the skb retains stale IP6CB data that overlaps with IPCB fields. A crafted outer Destination Options header sets o...

CVE-2026-80840

In the Linux kernel, the following vulnerability has been resolved: ipv6: seg6: clear IPv4 control block on IPIP decapsulation End.DX4 and End.DT4 decapsulate an IPv4 packet through decapandvalidate and send it directly to IPv4 routing. The inner packet therefore bypasses iprcvcore, which normall...

PT-2026-91306

In the Linux kernel, the following vulnerability has been resolved: ipv6: seg6: clear IPv4 control block on IPIP decapsulation End.DX4 and End.DT4 decapsulate an IPv4 packet through decap and validate and send it directly to IPv4 routing. The inner packet therefore bypasses ip rcv core, which...

CVE-2026-80840: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ipv6: seg6: clear IPv4 control block on IPIP decapsulation End.DX4 and End.DT4 decapsulate an IPv4 packet through decapandvalidate and send it directly to IPv4 routing. The inner packet therefore bypasses iprcvcore, which normall...

PT-2026-85718

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.2 Description An issue exists in the IPv6 Segment Routing seg6 implementation during IPIP decapsulation. When End.DX4 and End.DT4 decapsulate an IPv4 packet via the decap and validate function, the packet is se...

Linux Distros Unpatched Vulnerability : CVE-2026-80840

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ipv6: seg6: clear IPv4 control block on IPIP decapsulation End.DX4 and End.DT4 decapsulate an IPv4 packet through decapandvalidate and send it directly to IPv4...

SUSE CVE-2026-72053

In the Linux kernel, the following vulnerability has been resolved: net: ipip: require CAPNETADMIN in the device netns for changelink ipipchangelink operates on at most two netns, devnetdev and the tunnel link netns t-net. They differ once the device is created in or moved to a netns other than t...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Use dst in this direction when pushing the IPIP header. When pushing the IPIP header, the route of the other direction is used to calculate the headroom. Instead, use the route in this direction. Accessing t...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Support for IPIP tunnels with direct xmit. The combination of IPIP tunnels with direct xmit—for example, in the case of bridge devices—results in an issue because no dstentry is provided to check the...

SUSE CVE-2026-72248

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: support IPIP tunnel with direct xmit The combination of IPIP tunnel with direct xmit, eg. bridge device, breaks because no dstentry is provided to check the skb headroom and to set the iph-fragoff field. Thi...

SUSE CVE-2026-72249

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: use dst in this direction when pushing IPIP header When pushing the IPIP header, the route of the other direction is used to calculate the headroom, use the route in this direction. Accessing the other tuple...

CVE-2026-72249

A flaw was found in the Linux kernel's netfilter flowtable. When processing the IP-in-IP IPIP header, the system incorrectly uses routing information from the opposite direction to calculate packet headroom and fragmentation flags. This can lead to incorrect packet handling and potentially affect...

Linux Distros Unpatched Vulnerability : CVE-2026-72249

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: use dst in this direction when pushing IPIP header When pushing the IP...

Linux Distros Unpatched Vulnerability : CVE-2026-72248

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: support IPIP tunnel with direct xmit The combination of IPIP tunnel wi...

CVE-2026-72053

A flaw was found in the Linux kernel's ipip networking component. A local attacker with certain network administration capabilities in one network namespace could exploit an insufficient permission check in the ipipchangelink function. This could allow them to modify the configuration of a networ...

CVE-2026-72248

A flaw was found in the Linux kernel's netfilter flowtable component. When an Internet Protocol over Internet Protocol IPIP tunnel is used with direct transmit xmit, such as with a bridge device, the system fails to properly handle network packet destination entries. This improper handling can le...

CVE-2026-72249

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: use dst in this direction when pushing IPIP header When pushing the IPIP header, the route of the other direction is used to calculate the headroom, use the route in this direction. Accessing the other tuple...

CVE-2026-72248

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: support IPIP tunnel with direct xmit The combination of IPIP tunnel with direct xmit, eg. bridge device, breaks because no dstentry is provided to check the skb headroom and to set the iph-fragoff field. Thi...

CVE-2026-72053

In the Linux kernel, the following vulnerability has been resolved: net: ipip: require CAPNETADMIN in the device netns for changelink ipipchangelink operates on at most two netns, devnetdev and the tunnel link netns t-net. They differ once the device is created in or moved to a netns other than t...

UBUNTU-CVE-2026-72248

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: support IPIP tunnel with direct xmit The combination of IPIP tunnel with direct xmit, eg. bridge device, breaks because no dstentry is provided to check the skb headroom and to set the iph-fragoff field. Thi...