CVE-2025-38250: Bluetooth: hci_core: Fix use-after-free in vhci_flush()
Bluetooth: hcicore: Fix use-after-free in vhciflush()
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.104.2-1 - Configuration
Implement the fix by running hci_dev_reset() under SRCU and waiting for its completion to synchronize with in-flight users of hci_dev when vhci_flush/vhci file descriptors are involved.
Linux kernel Bluetooth (hci_vhci/hci_core) hci_dev_reset() synchronization = Use SRCU for synchronization (run hci_dev_reset() under SRCU and wait for completion)
Event History
Frequently Asked Questions
What is the severity of CVE-2025-38250?
CVE-2025-38250 has been classified with a high severity due to the potential for exploitation through use-after-free vulnerabilities in the Linux kernel.
How do I fix CVE-2025-38250?
To fix CVE-2025-38250, it is recommended to update your Linux kernel to the latest stable version that includes the patches addressing this vulnerability.
What vulnerabilities are associated with CVE-2025-38250?
CVE-2025-38250 specifically addresses a use-after-free vulnerability in the vhci_flush() function of the Linux kernel.
Which software versions are affected by CVE-2025-38250?
CVE-2025-38250 affects certain versions of the Linux kernel where the use-after-free vulnerability in the Bluetooth subsystem is present.
Who reported the vulnerability identified by CVE-2025-38250?
The vulnerability identified by CVE-2025-38250 was reported by syzbot.