CVE-2022-50445

Local CPU hang via XFRM tasklet reinjection

Published Oct 1, 2025 · Updated Oct 1, 2025

A denial of service in the Linux kernel XFRM subsystem allows local users to hang a CPU through transport-mode IPsec traffic. The xfrm_trans_reinject executor processes queued packets in tasklet context, where chained cryptographic and send processing can monopolize the software interrupt; the corrected implementation defers that work to a protected workqueue. Reachability requires local low-privileged access and the affected transport-mode traffic pattern, and the documented consequence is a watchdog-reported CPU soft lockup without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A denial of service in the Linux kernel XFRM subsystem allows local users to hang a CPU through transport-mode IPsec traffic. The xfrm_trans_reinject executor processes queued packets in tasklet context, where chained cryptographic and send processing can monopolize the software interrupt; the corrected implementation defers that work to a protected workqueue. Reachability requires local low-privileged access and the affected transport-mode traffic pattern, and the documented consequence is a watchdog-reported CPU soft lockup without confidentiality or integrity impact.

The record

CVE
CVE-2022-50445
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=4.15
  2. Affected versionversion=69895c5ea0ca2e8d7de1e6d36965d0ab9730787f
  3. Affected versionversion=833760100588acfb267dac4d6a02ab9931237739
  4. Affected versionversion=acf568ee859f098279eadf551612f103afdacb4e <130d9e5017ade1b81d16783563edb38c12a2eab7
  5. Affected versionversion=acf568ee859f098279eadf551612f103afdacb4e <4f4920669d21e1060b7243e5118dc3b71ced1276
  6. Affected versionversion=acf568ee859f098279eadf551612f103afdacb4e <7d98b26684cb2390729525b341ea099f0badbe18
  7. Affected versionversion=acf568ee859f098279eadf551612f103afdacb4e <f520075da484306bbb8425afd2c42404ba74816f
  8. Affected versionversion=e095ecaec6d94aa2156cceb98a85d409b51190f3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=69895c5ea0ca2e8d7de1e6d36965d0ab9730787f; version=833760100588acfb267dac4d6a02ab9931237739; version=acf568ee859f098279eadf551612f103afdacb4e <130d9e5017ade1b81d16783563edb38c12a2eab7; version=acf568ee859f098279eadf551612f103afdacb4e <4f4920669d21e1060b7243e5118dc3b71ced1276; version=acf568ee859f098279eadf551612f103afdacb4e <7d98b26684cb2390729525b341ea099f0badbe18; version=acf568ee859f098279eadf551612f103afdacb4e <f520075da484306bbb8425afd2c42404ba74816f; version=e095ecaec6d94aa2156cceb98a85d409b51190f3

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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