CVE-2026-74704

HIGHPre-NVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-22. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: 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:

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter

The sch_cake ACK filter parses packets to find the TCP header and filter duplicated ACKs if the flow is backlogged. The parsing code contains a WARN_ON(1) which can be triggered by a malformed IP header in certain cases. Depending on the system configuration, this leads either to either spamming dmesg with warnings, or a panic if panic_on_warn is set.

The code already correctly skips the offending packet in the branch that triggers the warning, so the WARN_ON itself doesn't really serve any purpose. So just drop it altogether to avoid the inconvenient side effects.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 25, 2026

Advisory Details (8)

Auto-updated Aug 25, 2026
No patch confirmed yet.
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a
generic

net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235

Vendor Advisories for CVE-2026-74704(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 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. 2026-08-30 05:21 UTCEG score recompute
  2. 2026-08-30 05:21 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 17:36 UTCGHSA enrichment
  5. 2026-08-29 05:38 UTCEG score recompute
  6. 2026-08-29 05:38 UTCGHSA enrichment
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-28 17:52 UTCGHSA enrichment
  9. 2026-08-28 06:04 UTCGHSA enrichment
  10. 2026-08-27 18:16 UTCEG score recompute
  11. 2026-08-27 18:16 UTCGHSA enrichment
  12. 2026-08-27 14:25 UTCEPSS rescore
  13. 2026-08-27 05:39 UTCGHSA enrichment
  14. 2026-08-26 17:51 UTCEG score recompute
  15. 2026-08-26 17:51 UTCGHSA enrichment
  16. 2026-08-26 14:47 UTCEPSS rescore
  17. 2026-08-26 05:58 UTCGHSA enrichment
  18. 2026-08-25 18:14 UTCEG score recompute
  19. 2026-08-25 18:14 UTCGHSA enrichment
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-25 06:29 UTCEG score recompute
  22. 2026-08-25 06:29 UTCGHSA enrichment
  23. 2026-08-25 05:55 UTCEG score recompute▲ 8.20
  24. 2026-08-25 05:55 UTCGHSA enrichment
  25. 2026-08-25 05:55 UTCMITRE cvelistV5CVSS v3 → 8.2 · severity → HIGH
Show 4 more
  1. 2026-08-24 14:18 UTCEPSS rescore
  2. 2026-08-22 16:24 UTCNVD update
  3. 2026-08-22 15:38 UTCEG score recompute
  4. 2026-08-22 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74704?
CVE-2026-74704 is a high vulnerability published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: net/sched: schcake: drop WARNON(1) for malformed packets in ACK filter The sch_cake ACK filter parses packets to find the TCP header and filter duplicated ACKs if the flow is backlogged. The parsing code contains a WARN_ON(1) which…
When was CVE-2026-74704 disclosed?
CVE-2026-74704 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74704 actively exploited?
CVE-2026-74704 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 63.1% of all scored CVEs.
What is the CVSS score of CVE-2026-74704?
CVE-2026-74704 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-74704?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74704, 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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