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CVE-2022-50374— Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure

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，该漏洞源于未正确处理percpu_init_rwsem失败情况，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2< d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d affected
67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2< b8917dce2134739b39bc0a5648b18427f2cad569 affected
67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2< 75b2c71ea581c7bb1303860d89366a42ad0506d2 affected
67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2< 98ce10f3f345e61fc6c83bff9cd11cda252b05ac affected
67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2< 3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1 affected
f6ec33f6bd3723a8146768106434ef6ab3d9d990 affected
4a53c4e84ace1bc75157a7281af3fe8f5b19d08c affected
4.14.63< 4.15 affected
… +7 more rows
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I. Basic Information for CVE-2022-50374

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure. While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于未正确处理percpu_init_rwsem失败情况，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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2 ~ d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d -
Linux Linux 4.15 -

II. Public POCs for CVE-2022-50374

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III. Intelligence Information for CVE-2022-50374

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Same Patch Batch · Linux · 2025-09-17 · 56 CVEs total

CVE-2023-53338 9.8 CRITICAL lwt: Fix return values of BPF xmit ops
CVE-2022-50373 9.8 CRITICAL fs: dlm: fix race in lowcomms
CVE-2022-50363 9.8 CRITICAL skmsg: pass gfp argument to alloc_sk_msg()
CVE-2023-53360 9.8 CRITICAL NFSv4.2: Rework scratch handling for READ_PLUS (again)
CVE-2023-53358 8.8 HIGH ksmbd: fix racy issue under cocurrent smb2 tree disconnect
CVE-2023-53340 7.8 HIGH net/mlx5: Collect command failures data only for known commands
CVE-2022-50368 7.8 HIGH drm/msm/dsi: fix memory corruption with too many bridges
CVE-2022-50367 7.8 HIGH fs: fix UAF/GPF bug in nilfs_mdt_destroy
CVE-2022-50362 7.8 HIGH dmaengine: hisilicon: Add multi-thread support for a DMA channel
CVE-2023-53354 7.8 HIGH skbuff: skb_segment, Call zero copy functions before using skbuff frags
CVE-2022-50355 7.8 HIGH staging: vt6655: fix some erroneous memory clean-up loops
CVE-2022-50354 7.8 HIGH drm/amdkfd: Fix kfd_process_device_init_vm error handling
CVE-2022-50365 7.5 HIGH skbuff: Account for tail adjustment during pull operations
CVE-2023-53335 7.5 HIGH RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()
CVE-2023-53337 nilfs2: do not write dirty data after degenerating to read-only
CVE-2023-53336 media: ipu-bridge: Fix null pointer deref on SSDB/PLD parsing warnings
CVE-2022-50372 cifs: Fix memory leak when build ntlmssp negotiate blob failed
CVE-2022-50371 led: qcom-lpg: Fix sleeping in atomic
CVE-2022-50369 drm/vkms: Fix null-ptr-deref in vkms_release()
CVE-2022-50370 i2c: designware: Fix handling of real but unexpected device interrupts

Showing top 20 of 56 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50374

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