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CVE-2023-54214— Bluetooth: L2CAP: Fix potential user-after-free

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 L2CAP存在释放后重用。

CVSS 8.8 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< b2fde8cb2a25125111f2144604e0e7c0ebcc4bba affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49 affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< 60aaccf16d1e099c16bebfb96428ae762cb528f7 affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< b8ed41cc04fb74005aa51d17865ca3d022760335 affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< 31a288a4df7f6a28e65da22a4ab2add4a963738e affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< 64e28ecf44e46de9f01915a4146706a21c3469d2 affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< 994e3e18908f5c4a12d07b44018e6aa85f071048 affected
a6a5568c03c4805d4d250f6bd9d468eeeb4ea059< df5703348813235874d851934e957c3723d71644 affected
… +10 more rows
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I. Basic Information for CVE-2023-54214

Vulnerability Information
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Vulnerability Title
Bluetooth: L2CAP: Fix potential user-after-free
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix potential user-after-free This fixes all instances of which requires to allocate a buffer calling alloc_skb which may release the chan lock and reacquire later which makes it possible that the chan is disconnected in the meantime.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/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 L2CAP存在释放后重用。
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 a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 ~ b2fde8cb2a25125111f2144604e0e7c0ebcc4bba -
Linux Linux 3.5 -

II. Public POCs for CVE-2023-54214

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III. Intelligence Information for CVE-2023-54214

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Other References for CVE-2023-54214 (8)

Same Patch Batch · Linux · 2025-12-30 · 244 CVEs total

CVE-2023-54258 9.8 CRITICAL cifs: fix potential oops in cifs_oplock_break
CVE-2023-54223 9.8 CRITICAL net/mlx5e: xsk: Fix invalid buffer access for legacy rq
CVE-2023-54237 9.8 CRITICAL net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link()
CVE-2023-54257 9.8 CRITICAL net: macb: fix a memory corruption in extended buffer descriptor mode
CVE-2023-54269 9.8 CRITICAL SUNRPC: double free xprt_ctxt while still in use
CVE-2023-54280 9.8 CRITICAL cifs: fix potential race when tree connecting ipc
CVE-2023-54292 9.8 CRITICAL RDMA/irdma: Fix data race on CQP request done
CVE-2023-54184 9.8 CRITICAL scsi: target: iscsit: Free cmds before session free
CVE-2023-54203 9.1 CRITICAL ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
CVE-2022-50880 8.8 HIGH wifi: ath10k: add peer map clean up for peer delete in ath10k_sta_state()
CVE-2023-54162 8.8 HIGH ksmbd: fix possible memory leak in smb2_lock()
CVE-2023-54262 8.8 HIGH net/mlx5e: Don't clone flow post action attributes second time
CVE-2023-54318 8.8 HIGH net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add
CVE-2023-54250 8.2 HIGH ksmbd: avoid out of bounds access in decode_preauth_ctxt()
CVE-2023-54164 8.0 HIGH Bluetooth: ISO: fix iso_conn related locking and validity issues
CVE-2023-54201 7.8 HIGH RDMA/efa: Fix wrong resources deallocation order
CVE-2022-50841 7.8 HIGH fs/ntfs3: Add overflow check for attribute size
CVE-2023-54206 7.8 HIGH net/sched: flower: fix filter idr initialization
CVE-2023-54216 7.8 HIGH net/mlx5e: TC, Fix using eswitch mapping in nic mode
CVE-2023-54210 7.8 HIGH Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()

Showing top 20 of 244 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-54214

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