CVE-2026-5589

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 88% of all CVEs by exploit prediction. 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: cisa-adp, epss
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.3Exploit: NoneExposed: 0

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

An integer underflow in bt_mesh_sol_recv() in the Bluetooth Mesh solicitation handling (subsys/bluetooth/mesh/solicitation.c) leads to an out-of-bounds write. When CONFIG_BT_MESH_OD_PRIV_PROXY_SRV is enabled, the function parses solicitation PDUs from raw BLE advertising payloads. The AD parsing loop reads an attacker-controlled length byte (reported_len) and computes reported_len - 3 without checking that reported_len >= 3. When reported_len is less than 3, the subtraction is performed in signed int arithmetic and yields a negative value that bypasses the length guard and is then implicitly converted to a very large size_t when passed to net_buf_simple_pull_mem(). In builds without assertions, this wraps the buffer length and advances the data pointer far out of bounds, so subsequent reads dereference invalid memory. A nearby BLE device can trigger this with a non-connectable advertisement carrying a UUID16 AD structure and a crafted length byte, with no pairing or prior association required, potentially leading to denial of service or arbitrary code execution.

CVSS v3
6.3
EG Score
6.3(medium)
EPSS
12.3%
KEV
Not listed

Published

June 4, 2026

Last Modified

July 8, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
Patch available. Sources: github.
github Patch Available

Out-of-bounds write caused by an integer underflow in the Bluetooth Mesh subsystem. · Advisory · zephyrproject-rtos/zephyr · GitHub

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4pm9-4v7f-x6gr

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 63× 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. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-07-04 06:31 UTCEPSS rescore
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  55. 2026-06-08 14:17 UTCEPSS rescore
  56. 2026-06-07 22:55 UTCEG score recompute▲ 6.30
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  58. 2026-06-06 13:47 UTCEPSS rescore
  59. 2026-06-05 22:47 UTCEPSS rescore
  60. 2026-06-04 20:10 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-5589?
CVE-2026-5589 is a medium vulnerability published on June 4, 2026. An integer underflow in btmeshsolrecv() in the Bluetooth Mesh solicitation handling (subsys/bluetooth/mesh/solicitation.c) leads to an out-of-bounds write. When CONFIGBTMESHODPRIVPROXYSRV is enabled, the function parses solicitation PDUs from raw BLE advertising payloads. The AD parsing loop reads…
When was CVE-2026-5589 disclosed?
CVE-2026-5589 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5589 actively exploited?
CVE-2026-5589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5589?
CVE-2026-5589 has a CVSS v3.1 base score of 6.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-5589?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5589, 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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