CVE-2022-49954

Local denial of service via missed waiter wakeup

Published Jun 18, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel iforce driver allows local users to hang device removal by closing an iforce device. The iforce_close path clears IFORCE_XMIT_RUNNING without waking tasks waiting for command completion, so device unregistration blocks behind the held device mutex. A low-privileged user must be able to open and close a connected or emulated iforce device; the reported consequence is a hung input-unregister task rather than data access or modification.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel iforce driver allows local users to hang device removal by closing an iforce device. The iforce_close path clears IFORCE_XMIT_RUNNING without waking tasks waiting for command completion, so device unregistration blocks behind the held device mutex. A low-privileged user must be able to open and close a connected or emulated iforce device; the reported consequence is a hung input-unregister task rather than data access or modification.

The record

CVE
CVE-2022-49954
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=2.6.33
  2. Affected versionversion=c2b27ef672992a206e5b221b8676972dd840ffa5 <98e01215708b6d416345465c09dce2bd4868c67a
  3. Affected versionversion=c2b27ef672992a206e5b221b8676972dd840ffa5 <b271090eea3899399e2adcf79c9c95367d472b03
  4. Affected versionversion=c2b27ef672992a206e5b221b8676972dd840ffa5 <b533b9d3a0d1327cbb31c201dc8dbbf98c8bfe3c
  5. Affected versionversion=c2b27ef672992a206e5b221b8676972dd840ffa5 <d186c65599bff0222da37b9215784ddfe39f9e1b
  6. Affected versionversion=c2b27ef672992a206e5b221b8676972dd840ffa5 <df1b53bc799d58f79701c465505a206c72ad4ab8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=c2b27ef672992a206e5b221b8676972dd840ffa5 <98e01215708b6d416345465c09dce2bd4868c67a; version=c2b27ef672992a206e5b221b8676972dd840ffa5 <b271090eea3899399e2adcf79c9c95367d472b03; version=c2b27ef672992a206e5b221b8676972dd840ffa5 <b533b9d3a0d1327cbb31c201dc8dbbf98c8bfe3c; version=c2b27ef672992a206e5b221b8676972dd840ffa5 <d186c65599bff0222da37b9215784ddfe39f9e1b; version=c2b27ef672992a206e5b221b8676972dd840ffa5 <df1b53bc799d58f79701c465505a206c72ad4ab8

Published CVSS scores

5.5CanonicalCVSS: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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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