What’s Vulnerable › Vulnerabilities

CVE-2026-74528: Bluetooth: hci_sync: hold conn in hci_past_sync() callback

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_past_sync() callback Avoids giving freed pointers to hci_conn_valid(), which kmalloc may have reused. Hold refcount to avoid that.

Affected products

• Linux kernel: 6.19 — fixed in 7.2

How to fix

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

References

• https://git.kernel.org/stable/c/abf9753edf3f88282c44a605f3945d8d4f8dd86c
• https://git.kernel.org/stable/c/e6792adef614b389141b142e30ee549e4a47dd7d

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