EUVD-2026-59341

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: fix and simplify IP6IP6 tunnel handling Fix nfflowip6tunnelproto to use pskbmaypull instead of skbheaderpointer to ensure the outer IPv6 header is in the skb headroom, which is required for subsequent packet...

CVE-2026-72417 netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto()

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Validate iph-ihl in nfflowip4tunnelproto Add sanity check for iph-ihl field in nfflowip4tunnelproto before using it to compute the header size, avoiding out-of-bounds access with malformed IP headers. While ...

CVE-2026-72417

The CVE-2026-72417 entry concerns the Linux kernel netfilter flowtable path, specifically nf_flow_ip4_tunnel_proto(). The vulnerability arises from processing IPv4 headers without validating iph->ihl, risking out-of-bounds access when headers are malformed. The fix adds a sanity check on iph-&...

EUVD-2026-59316

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Validate iph-ihl in nfflowip4tunnelproto Add sanity check for iph-ihl field in nfflowip4tunnelproto before using it to compute the header size, avoiding out-of-bounds access with malformed IP headers. While ...

CVE-2026-72417 netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto()

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Validate iph-ihl in nfflowip4tunnelproto Add sanity check for iph-ihl field in nfflowip4tunnelproto before using it to compute the header size, avoiding out-of-bounds access with malformed IP headers. While ...

CVE-2026-72249 netfilter: flowtable: use dst in this direction when pushing IPIP header

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 netfilter: flowtable: use dst in this direction when pushing IPIP header

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...

EUVD-2026-59148

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

The CVE-2026-72249 entry documents a Linux kernel netfilter flowtable bug: when pushing IPIP headers, the code uses the wrong direction’s route to calculate headroom, causing iph->frag_off and headroom handling to be incorrect. The issue arises from accessing the other tuple to set IP source/d...

CVE-2026-72248

The CVE-2026-72248 entry pertains to the Linux kernel netfilter flowtable: IPIP tunnels with direct xmit can crash the tunnel transmit path due to missing dst_entry when checking headroom and setting iph->frag_off. The workaround/patch moves dst_cache and dst_cookie out of the runtime union so...

CVE-2026-72248 netfilter: flowtable: support IPIP tunnel with direct xmit

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...

EUVD-2026-59147

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-2026-72248 netfilter: flowtable: support IPIP tunnel with direct xmit

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-2026-72246

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EUVD-2026-59145

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: use correct direction to set up tunnel route The layer 2 encapsulation and layer 3 tunnel information in the xmit path is taken from the other tuple, because the tunnel information that is included in the...

CVE-2026-72246 netfilter: flowtable: use correct direction to set up tunnel route

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: use correct direction to set up tunnel route The layer 2 encapsulation and layer 3 tunnel information in the xmit path is taken from the other tuple, because the tunnel information that is included in the...

CVE-2026-72246

CVE-2026-72246 — Linux kernel netfilter flowtable: The issue arises in the path that handles tunneling (Layer 2/3) during transmission, where tunnel information used for hashtable lookups could be sourced from the wrong direction, causing incorrect egress encapsulation. The patch fixes the tunnel...

CVE-2026-72249: Undefined Security Weakness

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: Undefined Security Weakness

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-2026-72417: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Validate iph-ihl in nfflowip4tunnelproto Add sanity check for iph-ihl field in nfflowip4tunnelproto before using it to compute the header size, avoiding out-of-bounds access with malformed IP headers. While ...