Answer in brief
CVE-2026-72417 records a Unknown severity vulnerability in netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ab427db17885814069bae891834f20842f0ac3a4 <025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7 || >=ab427db17885814069bae891834f20842f0ac3a4 <84460b644329e25809b4a6d9279d6359d7fd8ebc | 025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7, 84460b644329e25809b4a6d9279d6359d7fd8ebc |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-72417 records a Unknown severity vulnerability in netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ab427db17885814069bae891834f20842f0ac3a4 <025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7 || >=ab427db17885814069bae891834f20842f0ac3a4 <84460b644329e25809b4a6d9279d6359d7fd8ebc | 025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7, 84460b644329e25809b4a6d9279d6359d7fd8ebc |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.