CVE - CVE-2025-37918

CVE-ID
CVE-2025-37918	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue() A NULL pointer dereference can occur in skb_dequeue() when processing a QCA firmware crash dump on WCN7851 (0489:e0f3). [ 93.672166] Bluetooth: hci0: ACL memdump size(589824) [ 93.672475] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 93.672517] Workqueue: hci0 hci_devcd_rx [bluetooth] [ 93.672598] RIP: 0010:skb_dequeue+0x50/0x80 The issue stems from handle_dump_pkt_qca() returning 0 even when a dump packet is successfully processed. This is because it incorrectly forwards the return value of hci_devcd_init() (which returns 0 on success). As a result, the caller (btusb_recv_acl_qca() or btusb_recv_evt_qca()) assumes the packet was not handled and passes it to hci_recv_frame(), leading to premature kfree() of the skb. Later, hci_devcd_rx() attempts to dequeue the same skb from the dump queue, resulting in a NULL pointer dereference. Fix this by: 1. Making handle_dump_pkt_qca() return 0 on success and negative errno on failure, consistent with kernel conventions. 2. Splitting dump packet detection into separate functions for ACL and event packets for better structure and readability. This ensures dump packets are properly identified and consumed, avoiding double handling and preventing NULL pointer access.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0317b033abcd1d8dd2798f0e2de5e84543d0bd22 URL:https://git.kernel.org/stable/c/0317b033abcd1d8dd2798f0e2de5e84543d0bd22 MISC:https://git.kernel.org/stable/c/2e8d44ebaa7babdd5c5ab50ca275826e241920d6 URL:https://git.kernel.org/stable/c/2e8d44ebaa7babdd5c5ab50ca275826e241920d6 MISC:https://git.kernel.org/stable/c/8563d9fabd8a4b726ba7acab4737c438bf11a059 URL:https://git.kernel.org/stable/c/8563d9fabd8a4b726ba7acab4737c438bf11a059 MISC:https://git.kernel.org/stable/c/b70b41591ec48c78ec6a885e1f57bfc4029e5e13 URL:https://git.kernel.org/stable/c/b70b41591ec48c78ec6a885e1f57bfc4029e5e13
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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