CVE-2026-77237

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.

CVSS v3
6.5
EG Score
6.5(low)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
No patch confirmed yet.
generic

GitHub - FreeRTOS/FreeRTOS-Kernel at 11.3.1 · GitHub

https://github.com/FreeRTOS/FreeRTOS-Kernel/tree/11.3.1
generic

Issue with FreeRTOS-Kernel - CVE-2026-77234, CVE-2026-77235, CVE-2026-77236, CVE-2026-77237

https://aws.amazon.com/security/security-bulletins/2026-086-aws/

Vendor Advisories for CVE-2026-77237(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 21:24 UTCEG score recompute
  3. 2026-08-21 20:19 UTCEG score recompute
  4. 2026-08-21 19:55 UTCEG score recompute
  5. 2026-08-21 18:18 UTCEG score recompute
  6. 2026-08-21 18:04 UTCEG score recompute
  7. 2026-08-21 18:04 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-77237?
CVE-2026-77237 is a medium vulnerability published on August 21, 2026. Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSEQUEUESETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to version 11.3.1 or later.
When was CVE-2026-77237 disclosed?
CVE-2026-77237 was first published in the National Vulnerability Database on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77237 actively exploited?
CVE-2026-77237 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-77237?
CVE-2026-77237 has a CVSS v3 base score of 6.5 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-77237?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77237, 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

Explore the affected products and dependency analysis for CVE-2026-77237

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