CVE-2023-53086: kernel: wifi: mt76: connac: do not check WED status for non-mmio devices
Component: kernel
Severity: Moderate
CWE: CWE-358 (Improperly Implemented Security Check for Standard)
CVSS v3: 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Public date: 2025-05-02T00:00:00+00:00

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

wifi: mt76: connac: do not check WED status for non-mmio devices

WED is supported just for mmio devices, so do not check it for usb or
sdio devices. This patch fixes the crash reported below:

[   21.946627] wlp0s3u1i3: authenticate with c4:41:1e:f5:2b:1d
[   22.525298] wlp0s3u1i3: send auth to c4:41:1e:f5:2b:1d (try 1/3)
[   22.548274] wlp0s3u1i3: authenticate with c4:41:1e:f5:2b:1d
[   22.557694] wlp0s3u1i3: send auth to c4:41:1e:f5:2b:1d (try 1/3)
[   22.565885] wlp0s3u1i3: authenticated
[   22.569502] wlp0s3u1i3: associate with c4:41:1e:f5:2b:1d (try 1/3)
[   22.578966] wlp0s3u1i3: RX AssocResp from c4:41:1e:f5:2b:1d (capab=0x11 status=30 aid=3)
[   22.579113] wlp0s3u1i3: c4:41:1e:f5:2b:1d rejected association temporarily; comeback duration 1000 TU (1024 ms)
[   23.649518] wlp0s3u1i3: associate with c4:41:1e:f5:2b:1d (try 2/3)
[   23.752528] wlp0s3u1i3: RX AssocResp from c4:41:1e:f5:2b:1d (capab=0x11 status=0 aid=3)
[   23.797450] wlp0s3u1i3: associated
[   24.959527] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[   24.959640] BUG: unable to handle page fault for address: ffff88800c223200
[   24.959706] #PF: supervisor instruction fetch in kernel mode
[   24.959788] #PF: error_code(0x0011) - permissions violation
[   24.959846] PGD 2c01067 P4D 2c01067 PUD 2c02067 PMD c2a8063 PTE 800000000c223163
[   24.959957] Oops: 0011 [#1] PREEMPT SMP
[   24.960009] CPU: 0 PID: 391 Comm: wpa_supplicant Not tainted 6.2.0-kvm #18
[   24.960089] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014
[   24.960191] RIP: 0010:0xffff88800c223200
[   24.960446] RSP: 0018:ffffc90000ff7698 EFLAGS: 00010282
[   24.960513] RAX: ffff888028397010 RBX: ffff88800c26e630 RCX: 0000000000000058
[   24.960598] RDX: ffff88800c26f844 RSI: 0000000000000006 RDI: ffff888028397010
[   24.960682] RBP: ffff88800ea72f00 R08: 18b873fbab2b964c R09: be06b38235f3c63c
[   24.960766] R10: 18b873fbab2b964c R11: be06b38235f3c63c R12: 0000000000000001
[   24.960853] R13: ffff88800c26f84c R14: ffff8880063f0ff8 R15: ffff88800c26e644
[   24.960950] FS:  00007effcea327c0(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000
[   24.961036] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.961106] CR2: ffff88800c223200 CR3: 000000000eaa2000 CR4: 00000000000006b0
[   24.961190] Call Trace:
[   24.961219]  <TASK>
[   24.961245]  ? mt76_connac_mcu_add_key+0x2cf/0x310
[   24.961313]  ? mt7921_set_key+0x150/0x200
[   24.961365]  ? drv_set_key+0xa9/0x1b0
[   24.961418]  ? ieee80211_key_enable_hw_accel+0xd9/0x240
[   24.961485]  ? ieee80211_key_replace+0x3f3/0x730
[   24.961541]  ? crypto_shash_setkey+0x89/0xd0
[   24.961597]  ? ieee80211_key_link+0x2d7/0x3a0
[   24.961664]  ? crypto_aead_setauthsize+0x31/0x50
[   24.961730]  ? sta_info_hash_lookup+0xa6/0xf0
[   24.961785]  ? ieee80211_add_key+0x1fc/0x250
[   24.961842]  ? rdev_add_key+0x41/0x140
[   24.961882]  ? nl80211_parse_key+0x6c/0x2f0
[   24.961940]  ? nl80211_new_key+0x24a/0x290
[   24.961984]  ? genl_rcv_msg+0x36c/0x3a0
[   24.962036]  ? rdev_mod_link_station+0xe0/0xe0
[   24.962102]  ? nl80211_set_key+0x410/0x410
[   24.962143]  ? nl80211_pre_doit+0x200/0x200
[   24.962187]  ? genl_bind+0xc0/0xc0
[   24.962217]  ? netlink_rcv_skb+0xaa/0xd0
[   24.962259]  ? genl_rcv+0x24/0x40
[   24.962300]  ? netlink_unicast+0x224/0x2f0
[   24.962345]  ? netlink_sendmsg+0x30b/0x3d0
[   24.962388]  ? ____sys_sendmsg+0x109/0x1b0
[   24.962388]  ? ____sys_sendmsg+0x109/0x1b0
[   24.962440]  ? __import_iovec+0x2e/0x110
[   24.962482]  ? ___sys_sendmsg+0xbe/0xe0
[   24.962525]  ? mod_objcg_state+0x25c/0x330
[   24.962576]  ? __dentry_kill+0x19e/0x1d0
[   24.962618]  ? call_rcu+0x18f/0x270
[   24.962660]  ? __dentry_kill+0x19e/0x1d0
[   24.962702]  ? __x64_sys_sendmsg+0x70/0x90
[   24.962744]  ? do_syscall_64+0x3d/0x80
[   24.962796]  ? exit_to_user_mode_prepare+0x1b/0x70
[   24.962852]  ? entry_SYSCA
---truncated---


Affected upstream versions: 6.2
Fixed upstream versions: 0, 6.2.9, 6.3
Upstream repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Upstream fix commit: 53edfda851dd1ce41ac049ce2f195dc41dd27cc1