Answer in brief
CVE-2026-68189 records a Unknown severity vulnerability in Bluetooth: hci_sync: Protect UUID list traversal. 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 | >=161510ccf91c961638940b03abb1ee804be53a97 <e4fa2c5c261d736b8e58759fdef3a968d510630c || >=161510ccf91c961638940b03abb1ee804be53a97 <a351f68fb24828b23a971e00b8238ee0e8a40380 || >=161510ccf91c961638940b03abb1ee804be53a97 <a42f5536ea9c00e13f0c0fbb330feed95e2365ca || >=161510ccf91c961638940b03abb1ee804be53a97 <fe13adc258df88d95789e5673c7ba5178b5f8b28 || >=161510ccf91c961638940b03abb1ee804be53a97 <e9027ffbf5a0f3c12ca8900822e884eae9f0821b | e4fa2c5c261d736b8e58759fdef3a968d510630c, a351f68fb24828b23a971e00b8238ee0e8a40380, a42f5536ea9c00e13f0c0fbb330feed95e2365ca, fe13adc258df88d95789e5673c7ba5178b5f8b28, e9027ffbf5a0f3c12ca8900822e884eae9f0821b |
| Linux/Linuxgeneric | 5.17 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Protect UUID list traversal The hci_sync conversion moved class-of-device and EIR generation from an HCI request built under hdev->lock to asynchronous command sync work. The worker holds hdev->req_lock, but that lock does not serialize access to hdev->uuids against add_uuid() and remove_uuid(), which update the list under hdev->lock. The following interleaving can therefore occur: CPU0 (command sync work) CPU1 (management socket) fetch uuid from the list list_del(&uuid->list) kfree(uuid) read uuid->size KASAN reports the resulting use-after-free: BUG: KASAN: slab-use-after-free in eir_create+0xb8f/0xee0 Read of size 1 at addr ffff88810dbd8620 by task kworker/u17:0/87 Workqueue: hci0 hci_cmd_sync_work Call Trace: eir_create+0xb8f/0xee0 hci_update_eir_sync+0x1c0/0x330 hci_cmd_sync_work+0x13c/0x290 process_one_work+0x63a/0x1070 worker_thread+0x45b/0xd10 Allocated by task 86: __kasan_kmalloc+0x8f/0xa0 add_uuid+0x18a/0x4b0 hci_sock_sendmsg+0x1033/0x1ea0 Freed by task 92: __kasan_slab_free+0x43/0x70 kfree+0x131/0x3c0 remove_uuid+0x25e/0x560 hci_sock_sendmsg+0x1033/0x1ea0 Hold hdev->lock while generating and committing the class-of-device and EIR snapshots. Release it before sending an HCI command, so controller waits do not happen under the device lock. This protects all UUID list walks in these paths and restores the serialization lost in the command sync conversion.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68189 records a Unknown severity vulnerability in Bluetooth: hci_sync: Protect UUID list traversal. 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 | >=161510ccf91c961638940b03abb1ee804be53a97 <e4fa2c5c261d736b8e58759fdef3a968d510630c || >=161510ccf91c961638940b03abb1ee804be53a97 <a351f68fb24828b23a971e00b8238ee0e8a40380 || >=161510ccf91c961638940b03abb1ee804be53a97 <a42f5536ea9c00e13f0c0fbb330feed95e2365ca || >=161510ccf91c961638940b03abb1ee804be53a97 <fe13adc258df88d95789e5673c7ba5178b5f8b28 || >=161510ccf91c961638940b03abb1ee804be53a97 <e9027ffbf5a0f3c12ca8900822e884eae9f0821b | e4fa2c5c261d736b8e58759fdef3a968d510630c, a351f68fb24828b23a971e00b8238ee0e8a40380, a42f5536ea9c00e13f0c0fbb330feed95e2365ca, fe13adc258df88d95789e5673c7ba5178b5f8b28, e9027ffbf5a0f3c12ca8900822e884eae9f0821b |
| Linux/Linuxgeneric | 5.17 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Protect UUID list traversal The hci_sync conversion moved class-of-device and EIR generation from an HCI request built under hdev->lock to asynchronous command sync work. The worker holds hdev->req_lock, but that lock does not serialize access to hdev->uuids against add_uuid() and remove_uuid(), which update the list under hdev->lock. The following interleaving can therefore occur: CPU0 (command sync work) CPU1 (management socket) fetch uuid from the list list_del(&uuid->list) kfree(uuid) read uuid->size KASAN reports the resulting use-after-free: BUG: KASAN: slab-use-after-free in eir_create+0xb8f/0xee0 Read of size 1 at addr ffff88810dbd8620 by task kworker/u17:0/87 Workqueue: hci0 hci_cmd_sync_work Call Trace: eir_create+0xb8f/0xee0 hci_update_eir_sync+0x1c0/0x330 hci_cmd_sync_work+0x13c/0x290 process_one_work+0x63a/0x1070 worker_thread+0x45b/0xd10 Allocated by task 86: __kasan_kmalloc+0x8f/0xa0 add_uuid+0x18a/0x4b0 hci_sock_sendmsg+0x1033/0x1ea0 Freed by task 92: __kasan_slab_free+0x43/0x70 kfree+0x131/0x3c0 remove_uuid+0x25e/0x560 hci_sock_sendmsg+0x1033/0x1ea0 Hold hdev->lock while generating and committing the class-of-device and EIR snapshots. Release it before sending an HCI command, so controller waits do not happen under the device lock. This protects all UUID list walks in these paths and restores the serialization lost in the command sync conversion.
Quoted source text, attributed separately from HOL analysis.