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CVE-2025-40283— Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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Bluetooth btusb未正确清理资源顺序，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fd913ef7ce619467c6b0644af48ba1fec499c623< 297dbf87989e09af98f81f2bcb938041785557e8 affected
fd913ef7ce619467c6b0644af48ba1fec499c623< f858f004bc343a7ae9f2533bbb2a3ab27428532f affected
fd913ef7ce619467c6b0644af48ba1fec499c623< 7a6d1e740220ff9dfcb6a8c994d6ba49e76db198 affected
fd913ef7ce619467c6b0644af48ba1fec499c623< 5dc00065a0496c36694afe11e52a5bc64524a9b8 affected
fd913ef7ce619467c6b0644af48ba1fec499c623< 1c28c1e1522c773a94e26950ffb145e88cd9834b affected
fd913ef7ce619467c6b0644af48ba1fec499c623< 95b9b98c93b1c0916a3d4cf4540b7f5d69145a0d affected
fd913ef7ce619467c6b0644af48ba1fec499c623< a2610ecd9fd5708be8997ca8f033e4200c0bb6af affected
fd913ef7ce619467c6b0644af48ba1fec499c623< 23d22f2f71768034d6ef86168213843fc49bf550 affected
… +10 more rows
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I. Basic Information for CVE-2025-40283

Vulnerability Information
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Vulnerability Title
Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF There is a KASAN: slab-use-after-free read in btusb_disconnect(). Calling "usb_driver_release_interface(&btusb_driver, data->intf)" will free the btusb data associated with the interface. The same data is then used later in the function, hence the UAF. Fix by moving the accesses to btusb data to before the data is free'd.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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Bluetooth btusb未正确清理资源顺序，可能导致释放后重用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux fd913ef7ce619467c6b0644af48ba1fec499c623 ~ 297dbf87989e09af98f81f2bcb938041785557e8 -
Linux Linux 4.11 -

II. Public POCs for CVE-2025-40283

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III. Intelligence Information for CVE-2025-40283

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Same Patch Batch · Linux · 2025-12-06 · 23 CVEs total

CVE-2025-40282 8.8 HIGH Bluetooth: 6lowpan: reset link-local header on ipv6 recv path
CVE-2025-40273 8.8 HIGH NFSD: free copynotify stateid in nfs4_free_ol_stateid()
CVE-2025-40269 7.8 HIGH ALSA: usb-audio: Fix potential overflow of PCM transfer buffer
CVE-2025-40284 7.8 HIGH Bluetooth: MGMT: cancel mesh send timer when hdev removed
CVE-2025-40270 7.8 HIGH mm, swap: fix potential UAF issue for VMA readahead
CVE-2025-40280 7.8 HIGH tipc: Fix use-after-free in tipc_mon_reinit_self().
CVE-2025-40271 7.8 HIGH fs/proc: fix uaf in proc_readdir_de()
CVE-2025-40272 7.8 HIGH mm/secretmem: fix use-after-free race in fault handler
CVE-2025-40277 7.8 HIGH drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE
CVE-2025-40274 7.8 HIGH KVM: guest_memfd: Remove bindings on memslot deletion when gmem is dying
CVE-2025-40285 7.5 HIGH smb/server: fix possible refcount leak in smb2_sess_setup()
CVE-2025-40276 7.3 HIGH drm/panthor: Flush shmem writes before mapping buffers CPU-uncached
CVE-2025-40267 io_uring/rw: ensure allocated iovec gets cleared for early failure
CVE-2025-40289 drm/amdgpu: hide VRAM sysfs attributes on GPUs without VRAM
CVE-2025-40268 cifs: client: fix memory leak in smb3_fs_context_parse_param
CVE-2025-40275 ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd
CVE-2025-40278 net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
CVE-2025-40279 net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
CVE-2025-40281 sctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto
CVE-2025-40286 smb/server: fix possible memory leak in smb2_read()

Showing top 20 of 23 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40283

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