linux-cve-announce - CVE-2025-22032: wifi: mt76: mt7921: fix kernel panic due to null pointer dereference

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025041657-CVE-2025-22032-1c05@gregkh>
Date: Wed, 16 Apr 2025 16:12:03 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22032: wifi: mt76: mt7921: fix kernel panic due to null pointer dereference

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 ]---

The Linux kernel CVE team has assigned CVE-2025-22032 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.12.13 with commit 3fe7acc6f4b42ccb1056c5847f18f8eb2fec0834 and fixed in 6.12.23 with commit 0cfea60966e4b1239d20bebf02258295e189e82a
	Issue introduced in 6.13.2 with commit c9e40880416791287292046917e84bcb3a17e2d2 and fixed in 6.13.11 with commit effec50381991bc067acf4b3351a57831c74d27f
	Issue introduced in 6.14 with commit 90c10286b176421068b136da51ed83059a68e322 and fixed in 6.14.2 with commit 5a57f8eb2a17d469d65cd1186cea26b798221d4a
	Issue introduced in 6.14 with commit 90c10286b176421068b136da51ed83059a68e322 and fixed in 6.15-rc1 with commit adc3fd2a2277b7cc0b61692463771bf9bd298036

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-22032
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/wireless/mediatek/mt76/mt7921/main.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/0cfea60966e4b1239d20bebf02258295e189e82a
	https://git.kernel.org/stable/c/effec50381991bc067acf4b3351a57831c74d27f
	https://git.kernel.org/stable/c/5a57f8eb2a17d469d65cd1186cea26b798221d4a
	https://git.kernel.org/stable/c/adc3fd2a2277b7cc0b61692463771bf9bd298036