---
cve: "CVE-2026-63822"
severity: "LOW"
cvss: 3.1
epss: "0.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-19 12:16:55"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:04:32+02:00"
---

# CVE-2026-63822

> 3.1 LOW

## Beschreibung

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

wifi: ath11k: fix warning when unbinding

If there is an error during some initialization related to firmware,
the buffers dp->tx_ring[i].tx_status are released.
However this is released again when the device is unbinded (ath11k_pci),
and we get:
WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90
Call Trace:
free_large_kmalloc
ath11k_dp_free
ath11k_core_deinit
ath11k_pci_remove
...

The issue is always reproducible from a VM because the MSI addressing
initialization is failing.

In order to fix the issue, just set the buffers to NULL after releasing in
order to avoid the double free.

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.260
- Kernel ≥ 5.15.211
- Kernel ≥ 6.1.177
- Kernel ≥ 6.6.144
- Kernel ≥ 6.12.95
- Kernel ≥ 6.18.38
- Kernel ≥ 7.1.3

## Referenzen

- <https://git.kernel.org/stable/c/e569a5cb401a267168621aa9a1e7f07fcc9612c3>
- <https://git.kernel.org/stable/c/0aa097a370277deab5337030b9e2d395742f469c>
- <https://git.kernel.org/stable/c/0a946abb82f29abe9a15173b707a449cb039b43e>
- <https://git.kernel.org/stable/c/318703b6f71d1a29ee0ac46c32a38f7734d4cfb2>
- <https://git.kernel.org/stable/c/7b2e62b9080bf4a5f4e70cfe47156df8d93a4f13>
- <https://git.kernel.org/stable/c/40aa3c2b0cb8e34e0576fc94cc70e4e33db03c0a>
- <https://git.kernel.org/stable/c/051f954b94479d72222c9fbc82a3eef4777bca01>
- <https://git.kernel.org/stable/c/8b7a26b6681922a38cd5a7829ace61f8e54df9b7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63822) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_