---
cve: "CVE-2026-64406"
severity: "HIGH"
cvss: 8.0
epss: "27%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-25 10:17:24"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T00:56:55+02:00"
---

# CVE-2026-64406

> 8.0 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: fix UAF in bt_accept_dequeue()

bt_accept_get() takes a temporary reference before dropping the accept
queue lock. bt_accept_dequeue() currently drops that reference before
bt_accept_unlink(), leaving only the queue reference.

bt_accept_unlink() drops the queue reference. The subsequent
sock_hold() therefore accesses freed memory if it was the final
reference, as observed by KASAN during listening L2CAP socket cleanup.

Retain the temporary queue-walk reference through unlink and hand it to
the caller on success. Drop it explicitly on the closed and
not-yet-connected paths.

## CVSS-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.261
- Kernel ≥ 5.15.212
- Kernel ≥ 6.1.178
- Kernel ≥ 6.6.145
- Kernel ≥ 6.12.96
- Kernel ≥ 6.18.39
- Kernel ≥ 7.1.4

## Referenzen

- <https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d>
- <https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547>
- <https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0>
- <https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6>
- <https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db>
- <https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614>
- <https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049>
- <https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64406) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_