CVE-2026-74531

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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:

Bluetooth: hci_conn: hold conn reference in abort_conn_sync()

There is theoretical UAF if the conn is freed while the hci_sync task is running.

Hold refcount to avoid that.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (5)

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

Bluetooth: hci_conn: hold conn reference in abort_conn_sync() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fa812cfa81aa3d4a7b6ce8277979af57b3f79712
generic

Bluetooth: hci_conn: hold conn reference in abort_conn_sync() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8f9fef362bab431d95371d3406bc720350290c3
generic

Bluetooth: hci_conn: hold conn reference in abort_conn_sync() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/963fb4b8e7d1ab07b4ae45bf15d41e667c88caca
generic

Bluetooth: hci_conn: hold conn reference in abort_conn_sync() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64d1645f26aa49b5a86ba2fccd0bb6749ea725a6
generic

Bluetooth: hci_conn: hold conn reference in abort_conn_sync() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5761d003daa987ac81463f570713ce9c9dd204e5

Vendor Advisories for CVE-2026-74531(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 27× in last 7d / 27× 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 15:29 UTCGHSA enrichment
  2. 2026-08-20 04:05 UTCEG score recompute
  3. 2026-08-20 04:05 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 16:41 UTCGHSA enrichment
  6. 2026-08-19 05:16 UTCGHSA enrichment
  7. 2026-08-18 17:49 UTCEG score recompute
  8. 2026-08-18 17:49 UTCGHSA enrichment
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 06:16 UTCGHSA enrichment
  12. 2026-08-17 18:54 UTCEG score recompute
  13. 2026-08-17 18:54 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 06:24 UTCEG score recompute
  16. 2026-08-17 06:24 UTCGHSA enrichment
  17. 2026-08-17 05:54 UTCEG score recompute▲ 8.80
  18. 2026-08-17 05:54 UTCGHSA enrichment
  19. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  20. 2026-08-17 05:39 UTCEG score recompute
  21. 2026-08-17 05:39 UTCGHSA enrichment
  22. 2026-08-17 05:39 UTCMITRE cvelistV5
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-15 13:27 UTCNVD update
Show 2 more
  1. 2026-08-15 12:39 UTCEG score recompute
  2. 2026-08-15 12:37 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74531?
CVE-2026-74531 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hciconn: hold conn reference in abortconn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.
When was CVE-2026-74531 disclosed?
CVE-2026-74531 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-2026-74531 actively exploited?
CVE-2026-74531 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 82.9% of all scored CVEs.
What is the CVSS score of CVE-2026-74531?
CVE-2026-74531 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-74531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74531, 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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