CVE-2026-72417

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.

Package Linux Kernel
Published 2026-08-15
Last modified 2026-08-15
Patch available
Yes

Affected versions

Linux kernel versions 6.19 and later are affected. Fixed in 7.1.5, 7.2-rc1 and their respective stable series.

Affected from
≥ 6.19
Fixed in
✓ 7.1.5 7.1.x ✓ 7.2-rc1

References

2 total

Frequently asked questions

  • What is CVE-2026-72417?

    CVE-2026-72417 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.19 onward and has been patched in 7.1.5 and 7.2-rc1. CVE-2026-72417 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-72417?

    Yes. CVE-2026-72417 has been patched. Fixed versions include 7.1.5 and 7.2-rc1. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-72417 actively exploited?

    No. CVE-2026-72417 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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