CVE-2026-64078

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: x_tables: add and use xtables_unregister_table_exit

Previous change added xtables_unregister_table_pre_exit to detach the table from the packetpath and to unlink it from the active table list. In case of rmmod, userspace that is doing set/getsockopt for this table will not be able to re-instantiate the table:

  • The larval table has been removed already
  • existing instantiated table is no longer on the xt pernet table list.

This adds the second stage helper:

unlink the table from the dying list, free the hook ops (if any) and do the audit notification. It replaces xt_unregister_table().

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

July 19, 2026

Last Modified

July 20, 2026

Advisory Details (3)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

netfilter: x_tables: add and use xtables_unregister_table_exit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b4597d5fd7d2f8cebfffd40dffb5e003cc78964c
generic

netfilter: x_tables: add and use xtables_unregister_table_exit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/86ee5bc9c0f0e652e19f395675a432de11b75514
generic

netfilter: x_tables: add and use xtables_unregister_table_exit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf

Vendor Advisories for CVE-2026-64078(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-26ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-26ubuntu

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.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 26× in last 7d / 29× 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. 2026-07-27 13:00 UTCGHSA enrichment
  2. 2026-07-26 23:56 UTCEG score recompute
  3. 2026-07-26 23:56 UTCVendor advisory
  4. 2026-07-26 23:56 UTCGHSA enrichment
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 10:54 UTCEG score recompute
  8. 2026-07-26 10:54 UTCVendor advisory
  9. 2026-07-26 10:54 UTCGHSA enrichment
  10. 2026-07-25 14:18 UTCEPSS rescore
  11. 2026-07-25 14:18 UTCEPSS rescore
  12. 2026-07-24 14:18 UTCEPSS rescore
  13. 2026-07-24 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 14:18 UTCEPSS rescore
  16. 2026-07-23 03:22 UTCEG score recompute
  17. 2026-07-22 14:08 UTCEPSS rescore
  18. 2026-07-22 14:08 UTCEPSS rescore
  19. 2026-07-21 15:25 UTCEPSS rescore
  20. 2026-07-21 15:25 UTCEPSS rescore
  21. 2026-07-20 17:25 UTCEG score recompute
  22. 2026-07-20 17:25 UTCGHSA enrichment
  23. 2026-07-20 17:08 UTCEPSS rescore
  24. 2026-07-20 14:35 UTCEG score recompute▲ 7.80
  25. 2026-07-20 14:35 UTCGHSA enrichment
Show 4 more
  1. 2026-07-20 14:32 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  2. 2026-07-19 17:49 UTCNVD update
  3. 2026-07-19 16:11 UTCEG score recompute
  4. 2026-07-19 16:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64078?
CVE-2026-64078 is a high vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: add and use xtablesunregistertableexit Previous change added xtablesunregistertablepreexit to detach the table from the packetpath and to unlink it from the active table list. In case of rmmod, userspace that is…
When was CVE-2026-64078 disclosed?
CVE-2026-64078 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64078 actively exploited?
CVE-2026-64078 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 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64078?
CVE-2026-64078 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64078?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64078, 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.

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