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CVE-2025-38643— wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()

EPSS 0.02% · P7
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I. Basic Information for CVE-2025-38643

Vulnerability Information
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Vulnerability Title
wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac() Callers of wdev_chandef() must hold the wiphy mutex. But the worker cfg80211_propagate_cac_done_wk() never takes the lock. Which triggers the warning below with the mesh_peer_connected_dfs test from hostapd and not (yet) released mac80211 code changes: WARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdev_chandef+0x60/0x165 Modules linked in: CPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 Not tainted 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf Workqueue: cfg80211 cfg80211_propagate_cac_done_wk Stack: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Call Trace: [<6002ec30>] ? _printk+0x0/0x98 [<6003c2b3>] show_stack+0x10e/0x11a [<6002ec30>] ? _printk+0x0/0x98 [<60037608>] dump_stack_lvl+0x71/0xb8 [<6063717b>] ? wdev_chandef+0x60/0x165 [<6003766d>] dump_stack+0x1e/0x20 [<6005d1b7>] __warn+0x101/0x20f [<6005d3a8>] warn_slowpath_fmt+0xe3/0x15d [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<600b11a2>] ? mark_held_locks+0x5a/0x6e [<6005d2c5>] ? warn_slowpath_fmt+0x0/0x15d [<60052e53>] ? unblock_signals+0x3a/0xe7 [<60052f2d>] ? um_set_signals+0x2d/0x43 [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<607508b2>] ? lock_is_held_type+0x207/0x21f [<6063717b>] wdev_chandef+0x60/0x165 [<605f89b4>] regulatory_propagate_dfs_state+0x247/0x43f [<60052f00>] ? um_set_signals+0x0/0x43 [<605e6bfd>] cfg80211_propagate_cac_done_wk+0x3a/0x4a [<6007e460>] process_scheduled_works+0x3bc/0x60e [<6007d0ec>] ? move_linked_works+0x4d/0x81 [<6007d120>] ? assign_work+0x0/0xaa [<6007f81f>] worker_thread+0x220/0x2dc [<600786ef>] ? set_pf_worker+0x0/0x57 [<60087c96>] ? to_kthread+0x0/0x43 [<6008ab3c>] kthread+0x2d3/0x2e2 [<6007f5ff>] ? worker_thread+0x0/0x2dc [<6006c05b>] ? calculate_sigpending+0x0/0x56 [<6003b37d>] new_thread_handler+0x4a/0x64 irq event stamp: 614611 hardirqs last enabled at (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf hardirqs last disabled at (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf softirqs last enabled at (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985 softirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于cfg80211_check_and_end_cac缺少锁保护，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d ~ defe9ce121160788547e8e6ec4438ad8a14f40dd -
LinuxLinux 5.5 -

II. Public POCs for CVE-2025-38643

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III. Intelligence Information for CVE-2025-38643

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Same Patch Batch · Linux · 2025-08-22 · 60 CVEs total

CVE-2025-38634power: supply: cpcap-charger: Fix null check for power_supply_get_by_name
CVE-2025-38616tls: handle data disappearing from under the TLS ULP
CVE-2025-38620zloop: fix KASAN use-after-free of tag set
CVE-2025-38619media: ti: j721e-csi2rx: fix list_del corruption
CVE-2025-38621md: make rdev_addable usable for rcu mode
CVE-2025-38618vsock: Do not allow binding to VMADDR_PORT_ANY
CVE-2025-38630fbdev: imxfb: Check fb_add_videomode to prevent null-ptr-deref
CVE-2025-38632pinmux: fix race causing mux_owner NULL with active mux_usecount
CVE-2025-38631clk: imx95-blk-ctl: Fix synchronous abort
CVE-2025-38633clk: spacemit: mark K1 pll1_d8 as critical
CVE-2025-38629ALSA: usb: scarlett2: Fix missing NULL check
CVE-2025-38635clk: davinci: Add NULL check in davinci_lpsc_clk_register()
CVE-2025-38636rv: Use strings in da monitors tracepoints
CVE-2025-38638ipv6: add a retry logic in net6_rt_notify()
CVE-2025-38639netfilter: xt_nfacct: don't assume acct name is null-terminated
CVE-2025-38640bpf: Disable migration in nf_hook_run_bpf().
CVE-2025-38641Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure
CVE-2025-38642wifi: mac80211: fix WARN_ON for monitor mode on some devices
CVE-2025-38644wifi: mac80211: reject TDLS operations when station is not associated
CVE-2025-38645net/mlx5: Check device memory pointer before usage

Showing top 20 of 60 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38643

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