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CVE-2026-46056— Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

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，该漏洞源于蓝牙hci_event中SSP密码键处理函数存在潜在释放后重用问题，可能导致连接被并发释放。

CVSS 8.8 · High EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 92a25256f142d55e25f9959441cea6ddeabae57e< ea18732d2614557e59f4c0d8cdbe6611aeab33b7 affected
92a25256f142d55e25f9959441cea6ddeabae57e< d28311539ac9f65e29308ea219ecaa48aa5e76e5 affected
92a25256f142d55e25f9959441cea6ddeabae57e< b6ae482f88654db407c8c17619d4b62959b903ef affected
92a25256f142d55e25f9959441cea6ddeabae57e< 204028af77a265e31ceb4ba7f643349a3cca72b2 affected
92a25256f142d55e25f9959441cea6ddeabae57e< 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 affected
92a25256f142d55e25f9959441cea6ddeabae57e< e08d75753db17aa943d7622f09d9c217b5bfd3b8 affected
92a25256f142d55e25f9959441cea6ddeabae57e< 8c6443bb9257b780986fb67ec08565bf48ecb8d7 affected
92a25256f142d55e25f9959441cea6ddeabae57e< 85fa3512048793076eef658f66489112dcc91993 affected
… +10 more rows
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I. Basic Information for CVE-2026-46056

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.
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，该漏洞源于蓝牙hci_event中SSP密码键处理函数存在潜在释放后重用问题，可能导致连接被并发释放。
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 92a25256f142d55e25f9959441cea6ddeabae57e ~ ea18732d2614557e59f4c0d8cdbe6611aeab33b7 -
Linux Linux 3.7 -

II. Public POCs for CVE-2026-46056

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III. Intelligence Information for CVE-2026-46056

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Patches & Fixes for CVE-2026-46056 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45959 7.8 HIGH crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-46093 7.8 HIGH mm/vmalloc: take vmap_purge_lock in shrinker
CVE-2026-46053 7.8 HIGH net: rds: fix MR cleanup on copy error
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()
CVE-2026-45862 7.8 HIGH iommu/vt-d: Flush cache for PASID table before using it
CVE-2026-46100 7.8 HIGH fs: afs: revert mmap_prepare() change

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46056

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