Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7921: fix kernel panic due to null pointer dereference
Address a kernel panic caused by a null pointer dereference in the
`mt792x_rx_get_wcid` function. The issue arises because the `deflink` structure
is not properly initialized with the `sta` context. This patch ensures that the
`deflink` structure is correctly linked to the `sta` context, preventing the
null pointer dereference.
BUG: kernel NULL pointer dereference, address: 0000000000000400
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 UID: 0 PID: 470 Comm: mt76-usb-rx phy Not tainted 6.12.13-gentoo-dist #1
Hardware name: /AMD HUDSON-M1, BIOS 4.6.4 11/15/2011
RIP: 0010:mt792x_rx_get_wcid+0x48/0x140 [mt792x_lib]
RSP: 0018:ffffa147c055fd98 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff8e9ecb652000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8e9ecb652000
RBP: 0000000000000685 R08: ffff8e9ec6570000 R09: 0000000000000000
R10: ffff8e9ecd2ca000 R11: ffff8e9f22a217c0 R12: 0000000038010119
R13: 0000000080843801 R14: ffff8e9ec6570000 R15: ffff8e9ecb652000
FS: 0000000000000000(0000) GS:ffff8e9f22a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000400 CR3: 000000000d2ea000 CR4: 00000000000006f0
Call Trace:
<TASK>
? __die_body.cold+0x19/0x27
? page_fault_oops+0x15a/0x2f0
? search_module_extables+0x19/0x60
? search_bpf_extables+0x5f/0x80
? exc_page_fault+0x7e/0x180
? asm_exc_page_fault+0x26/0x30
? mt792x_rx_get_wcid+0x48/0x140 [mt792x_lib]
mt7921_queue_rx_skb+0x1c6/0xaa0 [mt7921_common]
mt76u_alloc_queues+0x784/0x810 [mt76_usb]
? __pfx___mt76_worker_fn+0x10/0x10 [mt76]
__mt76_worker_fn+0x4f/0x80 [mt76]
kthread+0xd2/0x100
? __pfx_kthread+0x10/0x10
ret_from_fork+0x34/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1a/0x30
</TASK>
---[ end trace 0000000000000000 ]---
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.12.13 – < 6.12.23, 6.13.2 – < 6.13.11, 6.14 | 6.12.23 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.12.25-1 | — |
| Debian 13 | linux | 6.12.25-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | linux-azure-fde | No fix yet | — |
| Ubuntu 25.04 | linux | 6.14.0-22.22 | USN-7594-1 |
| Ubuntu 25.04 | linux-aws +3 | 6.14.0-1007.7 | USN-7594-3, USN-7594-2, USN-7594-1 |
| Ubuntu 25.04 | linux-gcp | 6.14.0-1008.8 | USN-7594-1 |
| Ubuntu 25.04 | linux-realtime | 6.14.0-1004.4 | USN-7594-1 |
| Ubuntu 24.04 LTS | linux-azure-6.11 | 6.11.0-1018.18~24.04.1 | USN-7628-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.11 | 6.11.0-1016.16~24.04.1 | USN-7605-1 |
| Ubuntu 24.04 LTS | linux-hwe-6.11 | 6.11.0-28.28~24.04.1 | USN-7605-1 |
| Ubuntu 24.04 LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1015.16~24.04.2 | USN-7605-2 |
| Ubuntu 24.04 LTS | linux-nvidia-6.11 | 6.11.0-1012.12 | — |
| Ubuntu 24.04 LTS | linux-oem-6.11 | 6.11.0-1024.24 | USN-7606-1 |
| Ubuntu 24.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-101.33.4.3.el10uek | ELSA-2025-20530, ELSA-2025-20480 |
Advisories 10
- WID-SEC-2025-0844 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- USN-7628-1 linux-azure, linux-azure-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7605-1 linux, linux-aws, linux-gcp, linux-gcp-6.11, linux-hwe-6.11, linux-oracle, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7605-2 linux-lowlatency, linux-lowlatency-hwe-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7606-1 linux-oem-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-7594-2 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 4, 2026
- USN-7594-1 linux, linux-gcp, linux-raspi, linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Feb 4, 2026
- USN-7594-3 linux-aws, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Feb 4, 2026
- ELSA-2025-20530 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 18, 2025
- ELSA-2025-20480 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2025