CVE-2026-74564

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH

The XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode.

Update .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable. Otherwise, uninitialized access to the burst field in the union is possible.

Reject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by revision less than 3 too.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
36(Track)
EG Risk 36/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f
generic

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0
generic

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf
generic

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22
generic

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b

Vendor Advisories for CVE-2026-74564(1)

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

Data Freshness Timeline

(refreshed 32× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-08-21 06:56 UTCEG score recompute
  2. 2026-08-21 06:56 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 18:30 UTCGHSA enrichment
  5. 2026-08-20 06:04 UTCGHSA enrichment
  6. 2026-08-19 17:38 UTCEG score recompute
  7. 2026-08-19 17:38 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 16:52 UTCEG score recompute
  10. 2026-08-19 16:52 UTCGHSA enrichment
  11. 2026-08-19 08:11 UTCGHSA enrichment
  12. 2026-08-18 19:45 UTCEG score recompute
  13. 2026-08-18 19:45 UTCGHSA enrichment
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-18 07:19 UTCGHSA enrichment
  17. 2026-08-17 18:53 UTCEG score recompute
  18. 2026-08-17 18:53 UTCGHSA enrichment
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 06:23 UTCEG score recompute
  21. 2026-08-17 06:23 UTCGHSA enrichment
  22. 2026-08-17 05:54 UTCEG score recompute▲ 7.10
  23. 2026-08-17 05:54 UTCGHSA enrichment
  24. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.1 · severity → HIGH
  25. 2026-08-17 05:39 UTCEG score recompute
Show 7 more
  1. 2026-08-17 05:39 UTCGHSA enrichment
  2. 2026-08-17 05:39 UTCMITRE cvelistV5
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-15 13:27 UTCNVD update
  6. 2026-08-15 12:38 UTCEG score recompute
  7. 2026-08-15 12:37 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74564?
CVE-2026-74564 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: xthashlimit: validate hashtable supports XTHASHLIMITRATEMATCH The XTHASHLIMITRATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which…
When was CVE-2026-74564 disclosed?
CVE-2026-74564 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74564 actively exploited?
CVE-2026-74564 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-74564?
CVE-2026-74564 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-74564?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74564, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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