CVE-2026-68189: Bluetooth: hci_sync: Protect UUID list traversal

mediumCVSS 4.7CVE-2026-68189

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: The Bluetooth hci_sync UUID list traversal is not properly protected against concurrent modifications.
Who is affected: Systems running Linux kernel with Bluetooth subsystem enabled.
Urgency: Medium priority; CVSS 4.7, race condition in UUID list handling.
Action: Apply kernel patch adding synchronization to UUID list traversal in hci_sync.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68189

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-681890.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68189	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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