CVE-2022-50171Network attack vector

Service interruption via sleeping SEC2 request lock

Published Jun 18, 2025 · Updated Aug 5, 2026

A locking flaw in the Linux kernel allows remote attackers to interrupt service through network traffic handled by Hisilicon SEC2. The sec_request_init path uses a mutex for request-ID and queue operations while executing in softirq context, where a contended mutex attempts to sleep and triggers a scheduling-while-atomic fault. Exposure requires Kunpeng920 hardware with the SEC2 driver handling IPsec traffic; the reported result is a kernel error and service disruption, not data access or modification.

CVSS severity7.5
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A locking flaw in the Linux kernel allows remote attackers to interrupt service through network traffic handled by Hisilicon SEC2. The sec_request_init path uses a mutex for request-ID and queue operations while executing in softirq context, where a contended mutex attempts to sleep and triggers a scheduling-while-atomic fault. Exposure requires Kunpeng920 hardware with the SEC2 driver handling IPsec traffic; the reported result is a kernel error and service disruption, not data access or modification.

The record

CVE
CVE-2022-50171
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <02884a4f12de11f54d4ca67a07dd1f111d96fdbd
  2. Affected versionversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <16e18a8ac7c9748cf35a8d2f0ba2c6e8850e7568
  3. Affected versionversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <4a461ba5b9753352f438824fdd915cba675b1733
  4. Affected versionversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <aa495dfe71229b9034b59d8072ff0b2325ddd5ee
  5. Affected versionversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <c9be45e4c69fde36522274f04d1aa0d097ae3958
  6. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=416d82204df44ef727de6eafafeaa4d12fdc78dc <02884a4f12de11f54d4ca67a07dd1f111d96fdbd; version=416d82204df44ef727de6eafafeaa4d12fdc78dc <16e18a8ac7c9748cf35a8d2f0ba2c6e8850e7568; version=416d82204df44ef727de6eafafeaa4d12fdc78dc <4a461ba5b9753352f438824fdd915cba675b1733; version=416d82204df44ef727de6eafafeaa4d12fdc78dc <aa495dfe71229b9034b59d8072ff0b2325ddd5ee; version=416d82204df44ef727de6eafafeaa4d12fdc78dc <c9be45e4c69fde36522274f04d1aa0d097ae3958; version=5.5

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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