CVE-2026-72483

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. 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

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:

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control()

The max3421_hub_control() function handles USB hub class requests to the virtual root hub. In the default branches of both the ClearPortFeature and SetPortFeature switch statements, it modifies max3421_hcd->port_status by left shifting 1 by the request's value parameter. However, it does not validate whether this shift will exceed the width of port_status.

So if a malicious userspace task with access to the root hub via /dev/bus/usb/.../001 issues a USBDEVFS_CONTROL ioctl with wValue greater than or equal to 32, the left shift operation invokes shift-out-of-bounds undefined behavior. This results in arbitrary bit corruption of port_status, including the normally-immutable change bits, which can bypass internal state checks and confuse the hub status.

Fix this by rejecting requests whose value exceeds the shift width before performing the shift.

This issue was found using a KLEE-based symbolic execution tool for kernel drivers that I'm currently developing.

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
8%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (8)

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

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e5fa9d8f40746ec3447335c9642c03410f5fd3af
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d512bdefd241b98f4d7bcb5bab5614a86411fad4
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cff06b03b530ae1fe8a13e93a7848f2130e00fb4
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4da073d57176d8e1c2bca34febfbc81d2560c1a5
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3be5f24e8270ba53b3c814d13689bb8644c86237
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/08b1d4cab0230697bc74c63fc4e40170a7559c54
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/02d03c61e8a7b016956acb48e8a2512d16d87517
generic

usb: host: max3421: Fix shift-out-of-bounds in max3421_hub_control() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00dd025324b56d39d37e57a08f473dab3a660f30

Vendor Advisories for CVE-2026-72483(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 30× in last 7d / 30× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 22:35 UTCGHSA enrichment
  3. 2026-08-20 11:37 UTCGHSA enrichment
  4. 2026-08-20 00:39 UTCEG score recompute
  5. 2026-08-20 00:39 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 13:41 UTCGHSA enrichment
  8. 2026-08-19 02:38 UTCGHSA enrichment
  9. 2026-08-18 15:35 UTCEG score recompute
  10. 2026-08-18 15:35 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 04:26 UTCGHSA enrichment
  14. 2026-08-17 17:28 UTCEG score recompute
  15. 2026-08-17 17:28 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 06:27 UTCEG score recompute
  18. 2026-08-17 06:27 UTCGHSA enrichment
  19. 2026-08-17 05:57 UTCEG score recompute▲ 7.80
  20. 2026-08-17 05:57 UTCGHSA enrichment
  21. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  22. 2026-08-17 05:28 UTCEG score recompute
  23. 2026-08-17 05:28 UTCGHSA enrichment
  24. 2026-08-17 05:24 UTCMITRE cvelistV5
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 5 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 02:15 UTCEPSS rescore
  3. 2026-08-15 06:23 UTCNVD update
  4. 2026-08-15 06:03 UTCEG score recompute
  5. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72483?
CVE-2026-72483 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: host: max3421: Fix shift-out-of-bounds in max3421hubcontrol() The max3421hubcontrol() function handles USB hub class requests to the virtual root hub. In the default branches of both the ClearPortFeature and SetPortFeature…
When was CVE-2026-72483 disclosed?
CVE-2026-72483 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72483 actively exploited?
CVE-2026-72483 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 92.0% of all scored CVEs.
What is the CVSS score of CVE-2026-72483?
CVE-2026-72483 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-72483?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72483, 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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