CVE-2026-72417

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-15. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Oct 13, 2026
Patch available.
Web page

netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/84460b644329e25809b4a6d9279d6359d7fd8ebc
Web page

netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/025a41e76b51fbc7b8eaa5bacbaa9621d00e6aa7

Vendor Advisories for CVE-2026-72417(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 22× in last 7d / 169× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 433 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 333 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-19 12:49 UTCEG score recompute
  3. 2026-10-19 12:49 UTCVendor advisory
  4. 2026-10-19 12:49 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  6. 2026-10-18 11:18 UTCVendor advisory
  7. 2026-10-18 11:17 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-18 03:16 UTCEG score recompute
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-10-17 12:14 UTCEG score recompute
  11. 2026-10-17 12:13 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-10-16 13:08 UTCEG score recompute
  14. 2026-10-16 13:08 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  16. 2026-10-15 14:04 UTCEG score recompute
  17. 2026-10-15 14:04 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  19. 2026-10-14 08:51 UTCEG score recompute
  20. 2026-10-14 08:51 UTCVendor advisory
  21. 2026-10-14 08:51 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  23. 2026-10-13 04:51 UTCEG score recompute
  24. 2026-10-13 04:51 UTCVendor advisory
  25. 2026-10-13 04:51 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 75 more
  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  2. 2026-10-12 15:41 UTCEG score recompute
  3. 2026-10-12 05:49 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-11 19:27 UTCEG score recompute
  5. 2026-10-11 16:43 UTCEG score recompute
  6. 2026-10-11 14:03 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  12. 2026-10-07 06:19 UTCVendor advisory
  13. 2026-10-07 06:19 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-07 02:28 UTCVendor advisory
  15. 2026-10-07 02:28 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-06 22:37 UTCVendor advisory
  17. 2026-10-06 22:37 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-06 17:16 UTCEG score recompute
  19. 2026-10-06 17:16 UTCVendor advisory
  20. 2026-10-06 17:15 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-10-06 13:13 UTCVendor advisory
  23. 2026-10-06 13:13 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-06 09:13 UTCEG score recompute
  25. 2026-10-06 09:13 UTCVendor advisory
  26. 2026-10-06 09:13 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  28. 2026-10-05 17:36 UTCVendor advisory
  29. 2026-10-05 17:36 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-10-05 12:26 UTCVendor advisory
  31. 2026-10-05 12:26 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-05 06:47 UTCVendor advisory
  33. 2026-10-05 06:47 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-05 02:24 UTCEG score recompute
  35. 2026-10-05 02:24 UTCVendor advisory
  36. 2026-10-05 02:24 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  38. 2026-10-04 22:01 UTCVendor advisory
  39. 2026-10-04 22:01 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-04 16:29 UTCVendor advisory
  41. 2026-10-04 16:29 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-10-04 12:07 UTCVendor advisory
  43. 2026-10-04 12:06 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-04 07:25 UTCVendor advisory
  45. 2026-10-04 07:25 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-10-04 03:34 UTCVendor advisory
  47. 2026-10-04 03:34 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-03 19:34 UTCEG score recompute
  49. 2026-10-03 19:34 UTCVendor advisory
  50. 2026-10-03 19:34 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  52. 2026-10-03 00:49 UTCVendor advisory
  53. 2026-10-03 00:49 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-02 19:44 UTCEG score recompute
  55. 2026-10-02 19:44 UTCVendor advisory
  56. 2026-10-02 19:44 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  57. 2026-10-02 15:53 UTCVendor advisory
  58. 2026-10-02 15:53 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-10-02 07:10 UTCEG score recompute
  60. 2026-10-02 07:10 UTCVendor advisory
  61. 2026-10-02 07:10 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  63. 2026-10-01 13:39 UTCVendor advisory
  64. 2026-10-01 13:39 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-10-01 09:48 UTCVendor advisory
  66. 2026-10-01 09:47 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-10-01 05:51 UTCVendor advisory
  68. 2026-10-01 05:51 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-10-01 01:35 UTCVendor advisory
  70. 2026-10-01 01:35 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-09-30 21:06 UTCEG score recompute
  72. 2026-09-30 21:06 UTCVendor advisory
  73. 2026-09-30 21:06 UTCGHSA enrichmentGHSA-qcmg-5w5p-j7v4 · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  75. 2026-09-29 07:56 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-72417?
CVE-2026-72417 is a critical-severity vulnerability; its CVE record was published on August 15, 2026. 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.…
When was the CVE record for CVE-2026-72417 published?
The CVE record for CVE-2026-72417 was published on August 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 17, 2026; the record at its source may have been updated since.
Is CVE-2026-72417 actively exploited?
CVE-2026-72417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72417?
CVE-2026-72417 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72417?
A fix for CVE-2026-72417 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72417 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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