CVE-2026-74746

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: 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: flowtable: publish GC-visible tuple last

nf_flow_table_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flow_offload_add() is still inserting the reply node. Publish the reply node first and the original node last so GC never sees a partially installed flow.

KASAN can trigger slab-use-after-free read and write reports in the flowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del, flow_offload_lookup, etc.).

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 27, 2026

Advisory Details (8)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780
generic

netfilter: flowtable: publish GC-visible tuple last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa

Vendor Advisories for CVE-2026-74746(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 29× 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. 2026-08-30 04:19 UTCEG score recompute
  2. 2026-08-30 04:19 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-30 00:17 UTCGHSA enrichment
  5. 2026-08-29 20:14 UTCGHSA enrichment
  6. 2026-08-29 16:12 UTCGHSA enrichment
  7. 2026-08-29 12:07 UTCGHSA enrichment
  8. 2026-08-29 08:00 UTCGHSA enrichment
  9. 2026-08-29 03:59 UTCGHSA enrichment
  10. 2026-08-28 23:58 UTCEG score recompute
  11. 2026-08-28 23:58 UTCGHSA enrichment
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-28 18:47 UTCGHSA enrichment
  14. 2026-08-28 14:42 UTCGHSA enrichment
  15. 2026-08-28 10:37 UTCGHSA enrichment
  16. 2026-08-28 06:36 UTCGHSA enrichment
  17. 2026-08-28 02:33 UTCGHSA enrichment
  18. 2026-08-27 22:32 UTCGHSA enrichment
  19. 2026-08-27 18:31 UTCGHSA enrichment
  20. 2026-08-27 14:27 UTCEG score recompute
  21. 2026-08-27 14:27 UTCGHSA enrichment
  22. 2026-08-27 14:25 UTCEPSS rescore
  23. 2026-08-27 10:23 UTCEG score recompute
  24. 2026-08-27 10:23 UTCGHSA enrichment
  25. 2026-08-27 06:22 UTCEG score recompute▲ 9.80
Show 4 more
  1. 2026-08-27 06:11 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  2. 2026-08-26 15:43 UTCNVD update
  3. 2026-08-26 14:43 UTCEG score recompute
  4. 2026-08-26 14:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74746?
CVE-2026-74746 is a critical vulnerability published on August 26, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: publish GC-visible tuple last nfflowtable_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flowoffloadadd() is…
When was CVE-2026-74746 disclosed?
CVE-2026-74746 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74746 actively exploited?
CVE-2026-74746 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.8% of all scored CVEs.
What is the CVSS score of CVE-2026-74746?
CVE-2026-74746 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74746?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74746, 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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