What’s Vulnerable › Vulnerabilities

CVE-2026-74531: Bluetooth: hci_conn: hold conn reference in abort_conn_sync()

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.

Affected products

• Linux kernel: from 6.6.51 before 6.6.151; from 6.1.184 before 6.2; from 6.10.10 before 6.11; 6.11 — fixed in 6.11, 6.2, 6.6.151, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.11, 6.2, 6.6.151, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5761d003daa987ac81463f570713ce9c9dd204e5
• https://git.kernel.org/stable/c/64d1645f26aa49b5a86ba2fccd0bb6749ea725a6
• https://git.kernel.org/stable/c/963fb4b8e7d1ab07b4ae45bf15d41e667c88caca
• https://git.kernel.org/stable/c/e8f9fef362bab431d95371d3406bc720350290c3
• https://git.kernel.org/stable/c/fa812cfa81aa3d4a7b6ce8277979af57b3f79712

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