Bug 2376073 (CVE-2025-38128)

Summary: CVE-2025-38128 kernel: Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-03 09:03:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands

In 'mgmt_hci_cmd_sync()', check whether the size of parameters passed
in 'struct mgmt_cp_hci_cmd_sync' matches the total size of the data
(i.e. 'sizeof(struct mgmt_cp_hci_cmd_sync)' plus trailing bytes).
Otherwise, large invalid 'params_len' will cause 'hci_cmd_sync_alloc()'
to do 'skb_put_data()' from an area beyond the one actually passed to
'mgmt_hci_cmd_sync()'.
Comment 1 Avinash Hanwate 2025-07-03 16:54:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070329-CVE-2025-38128-5b44@gregkh/T