# CVE-2026-99014: linux: In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: hci_sync: Fix command skb lifetime du...

CVE-2026-99014 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99014, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-99014
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 23, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: hci_sync: Fix command skb lifetime during scan setup  During PA sync scan setup, hci_le_set_ext_scan_param_sync() gets the address used for the PA_LINK lookup from hci_sent_cmd_data(). The returned pointer borrows storage from sent_cmd or req_skb, without holding a reference to either skb.  The scan worker runs on req_workqueue while hci_cmd_work() runs on the separate device workqueue. After the scan worker loads sent_cmd, the command worker can free and replace it before hci_sent_cmd_data() dereferences the skb. The command payload can also be freed between returning from the helper and comparing the address. The connection lookup's RCU critical section does not protect the command skb.  KASAN reported:    BUG: KASAN: slab-use-after-free in hci_sent_cmd_data+0x27c/0x2f0   Workqueue: hci0 hci_cmd_sync_work   Call Trace:    hci_sent_cmd_data+0x27c/0x2f0    hci_le_set_scan_param_sync+0x43a/0x850    hci_passive_scan_sync+0xb09/0x1460    hci_update_passive_scan_sync+0x47c/0x6e0    hci_le_pa_create_sync+0x200/0xa70    hci_cmd_sync_work+0x13c/0x290    Allocated by task 95:    skb_clone+0x13f/0x340    hci_cmd_work+0x2a9/0x7e0    Freed by task 95:    kmem_cache_free+0xba/0x3a0    hci_cmd_work+0x29c/0x7e0  Use hdev->lock to serialize the address snapshot with sent_cmd replacement. Protect req_skb replacement and completion cleanup with the same lock because the helper falls back to that skb. Copy the address before releasing the lock and use the copy for the existing RCU-protected connection lookup. Release the mutex before sending or waiting for commands, preserving the lookup and completion ordering.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-99014](https://patchblox.com/security/data/fix/linux/debian-cve-2026-99014.md) | Oct 24, 2026 |
| Linux | linux Debian 14 | 7.2.11-1 | [DEBIAN-CVE-2026-99014](https://patchblox.com/security/data/fix/linux/debian-cve-2026-99014.md) | Oct 24, 2026 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.