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CVE-2026-43119: Bluetooth: hci_sync: annotate data-races around hdev->req_status

mediumCVSS 5.5CVE-2026-43119

CSIRTS triage

vendor: Linuxproduct: Linux kernelMemory corruption
What
Data races around hdev->req_status in Bluetooth hci_sync code can cause memory corruption.
Who is affected
Systems running affected Linux kernel versions with Bluetooth enabled.
Urgency
Medium priority; not currently exploited but data races can cause unpredictable behavior.
Action
Apply Linux kernel patch addressing hci_sync data-race annotations or update to patched kernel version.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.5
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43119

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-43119coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Bluetooth

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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