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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-72417

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto() Add sanity check for iph->ihl field in nf_flow_ip4_tunnel_proto() before using it to compute the header size, avoiding out-of-bounds access with malformed IP headers. While at it, use iph->protocol instead of the hardcoded IPPROTO_IPIP constant when setting ctx->tun.proto and reference ctx->tun.hdr_size when updating ctx->offset.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ab427db17885814069bae891834f20842f0ac3a4 to < 025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7affected
  • ab427db17885814069bae891834f20842f0ac3a4 to < 84460b644329e25809b4a6d9279d6359d7fd8ebcaffected

Linux Linux

Default version status: affected

  • 6.19affected
  • 0 to < 6.19unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References