CVE-2026-63822
Description
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.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | d5c65159f2895379e11ca13f62feabe93278985d < e569a5cb401a267168621aa9a1e7f07fcc9612c3, d5c65159f2895379e11ca13f62feabe93278985d < 0aa097a370277deab5337030b9e2d395742f469c, d5c65159f2895379e11ca13f62feabe93278985d < 0a946abb82f29abe9a15173b707a449cb039b43e, d5c65159f2895379e11ca13f62feabe93278985d < 318703b6f71d1a29ee0ac46c32a38f7734d4cfb2 … |
| Linux | Linux | — | 5.6, 0 < 5.6, 5.10.260 ≤ 5.10.*, 5.15.211 ≤ 5.15.* … |
References (8)
- 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