Answer in brief
CVE-2025-37918 records a Unknown severity vulnerability in Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <2e8d44ebaa7babdd5c5ab50ca275826e241920d6 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <b70b41591ec48c78ec6a885e1f57bfc4029e5e13 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <8563d9fabd8a4b726ba7acab4737c438bf11a059 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <0317b033abcd1d8dd2798f0e2de5e84543d0bd22 | 2e8d44ebaa7babdd5c5ab50ca275826e241920d6, b70b41591ec48c78ec6a885e1f57bfc4029e5e13, 8563d9fabd8a4b726ba7acab4737c438bf11a059, 0317b033abcd1d8dd2798f0e2de5e84543d0bd22 |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
May 20, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-37918 records a Unknown severity vulnerability in Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <2e8d44ebaa7babdd5c5ab50ca275826e241920d6 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <b70b41591ec48c78ec6a885e1f57bfc4029e5e13 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <8563d9fabd8a4b726ba7acab4737c438bf11a059 || >=20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6 <0317b033abcd1d8dd2798f0e2de5e84543d0bd22 | 2e8d44ebaa7babdd5c5ab50ca275826e241920d6, b70b41591ec48c78ec6a885e1f57bfc4029e5e13, 8563d9fabd8a4b726ba7acab4737c438bf11a059, 0317b033abcd1d8dd2798f0e2de5e84543d0bd22 |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
May 20, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.