CVE-2024-57879: Bluetooth: iso: Always release hdev at the end of iso_listen_bis

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-11 · updated 2026-06-17
Weakness: CWE-404

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: iso: Always release hdev at the end of iso_listen_bis Since hci_get_route holds the device before returning, the hdev should be released with hci_dev_put at the end of iso_listen_bis even if the function returns with an error.

Affected products

Linux kernel: from 6.8.12 before 6.9; from 6.9 before 6.12.6; 6.13-rc1, 6.13-rc2 — fixed in 6.12.6, 6.9

How to fix

Upgrade to a fixed version: Linux kernel 6.12.6, 6.9. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/4ca50db1c567d658d173c5ef3ee6c52b0b03603c
https://git.kernel.org/stable/c/9c76fff747a73ba01d1d87ed53dd9c00cb40ba05

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