CVE-2026-74733

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-22. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 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:

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock

Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written.

A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.

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
2%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 25, 2026

Advisory Details (2)

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

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9dc325327babe7f159e84cbe9380a45342da0585
generic

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e6a2f5f845f50b0c4299bace5111f56d3390a090

Vendor Advisories for CVE-2026-74733(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 22× in last 7d / 25× 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 01:22 UTCEPSS rescore
  2. 2026-08-29 19:37 UTCGHSA enrichment
  3. 2026-08-29 07:31 UTCEG score recompute
  4. 2026-08-29 07:31 UTCGHSA enrichment
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 19:25 UTCGHSA enrichment
  7. 2026-08-28 07:19 UTCGHSA enrichment
  8. 2026-08-27 19:06 UTCEG score recompute
  9. 2026-08-27 19:06 UTCGHSA enrichment
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-27 06:54 UTCGHSA enrichment
  12. 2026-08-26 18:46 UTCGHSA enrichment
  13. 2026-08-26 06:40 UTCGHSA enrichment
  14. 2026-08-25 18:34 UTCEG score recompute
  15. 2026-08-25 18:34 UTCGHSA enrichment
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-25 06:28 UTCEG score recompute
  18. 2026-08-25 06:28 UTCGHSA enrichment
  19. 2026-08-25 05:55 UTCEG score recompute▲ 7.80
  20. 2026-08-25 05:55 UTCGHSA enrichment
  21. 2026-08-25 05:55 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  22. 2026-08-24 14:18 UTCEPSS rescore
  23. 2026-08-22 16:24 UTCNVD update
  24. 2026-08-22 15:36 UTCEG score recompute
  25. 2026-08-22 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74733?
CVE-2026-74733 is a high vulnerability published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953xirqbussyncunlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2clock. The function…
When was CVE-2026-74733 disclosed?
CVE-2026-74733 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-2026-74733 actively exploited?
CVE-2026-74733 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 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-74733?
CVE-2026-74733 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-74733?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74733, 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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