Bug 2376073 (CVE-2025-38128)

Summary: CVE-2025-38128 kernel: Linux kernel: Memory corruption in Bluetooth subsystem via malformed HCI_CMD_SYNC command
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's Bluetooth subsystem. A local attacker can exploit this vulnerability by sending a specially crafted HCI_CMD_SYNC command with a malformed parameter length. This can lead to memory corruption, potentially causing a denial of service or system instability.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

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