CVE-2026-10593

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 92% 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: epss, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

The Zephyr Bluetooth LE Audio Basic Audio Profile (BAP) unicast client mishandles peer-supplied ASE state notifications. In unicast_client_ep_qos_state() (subsys/bluetooth/audio/bap_unicast_client.c), the handler writes attacker-controlled QoS fields (interval, framing, phy, sdu, rtn, latency, pd) through the stream->qos pointer with only a stream != NULL guard. stream->qos is NULL for any stream that has been codec-configured via bt_bap_stream_config() but not yet added to a unicast group (it is set only by unicast_group_add_stream()).

A malicious or buggy remote ASCS server, to which the local device is connected as a BAP unicast client, can send a GATT notification announcing the ASE has entered the QoS Configured state while the local endpoint is still in the Codec Configured state — a transition the dispatcher explicitly permits — during that window, causing a write through a NULL pointer and a crash (denial of service). The data written is itself remote-controlled.

The defect shipped in v4.3.0 and v4.4.0 (and earlier). The fix re-points all BAP QoS storage to the always-valid embedded ep->qos struct, eliminating the NULL dereference.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
8.2%
KEV
Not listed

Published

June 28, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Remotely triggerable NULL-pointer dereference in Bluetooth LE Audio BAP unicast client QoS-state handling · Advisory · zephyrproject-rtos/zephyr · GitHub

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-22q8-m94g-2pwh
github_commit

commit 52f25c903f29 (zephyrproject-rtos/zephyr)

Fix landed in zephyrproject-rtos/zephyr commit 52f25c903f29 — awaiting tagged release

https://github.com/zephyrproject-rtos/zephyr/commit/52f25c903f2926cb1281b50fd79654668e2d483f

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 39× 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 20:55 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-14 19:54 UTCEG score recompute
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 19:00 UTCEG score recompute
  7. 2026-07-13 06:12 UTCEPSS rescore
  8. 2026-07-12 18:05 UTCEG score recompute
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 17:10 UTCEG score recompute
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-10 16:16 UTCEG score recompute
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 15:15 UTCEG score recompute
  15. 2026-07-08 15:15 UTCEPSS rescore
  16. 2026-07-08 15:15 UTCEPSS rescore
  17. 2026-07-08 14:21 UTCEG score recompute
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-07 13:27 UTCEG score recompute
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 12:33 UTCEG score recompute
  22. 2026-07-06 02:23 UTCEPSS rescore
  23. 2026-07-05 11:39 UTCEG score recompute
  24. 2026-07-05 02:30 UTCEPSS rescore
  25. 2026-07-05 02:30 UTCEPSS rescore
Show 14 more
  1. 2026-07-04 10:45 UTCEG score recompute
  2. 2026-07-04 06:31 UTCEPSS rescore
  3. 2026-07-03 09:40 UTCEG score recompute
  4. 2026-07-02 08:46 UTCEG score recompute
  5. 2026-07-01 15:06 UTCEPSS rescore
  6. 2026-07-01 15:06 UTCEPSS rescore
  7. 2026-07-01 07:49 UTCEG score recompute
  8. 2026-06-30 23:22 UTCEPSS rescore
  9. 2026-06-30 06:54 UTCEG score recompute
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-29 05:59 UTCEG score recompute
  12. 2026-06-28 14:07 UTCEPSS rescore
  13. 2026-06-28 05:03 UTCEG score recompute
  14. 2026-06-28 05:01 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-10593?
CVE-2026-10593 is a medium vulnerability published on June 28, 2026. The Zephyr Bluetooth LE Audio Basic Audio Profile (BAP) unicast client mishandles peer-supplied ASE state notifications. In unicastclientepqosstate() (subsys/bluetooth/audio/bapunicastclient.c), the handler writes attacker-controlled QoS fields (interval, framing, phy, sdu, rtn, latency, pd)…
When was CVE-2026-10593 disclosed?
CVE-2026-10593 was first published in the National Vulnerability Database on June 28, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10593 actively exploited?
CVE-2026-10593 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-10593?
CVE-2026-10593 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-10593?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10593, 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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