CVE-2022-49685

Kernel memory corruption via unsynchronized trigger removal

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in Linux kernel IIO sysfs triggers allows local users to corrupt kernel memory during trigger removal. The iio_sysfs_trigger_remove function frees the trigger without first synchronizing queued irq_work, allowing irq_work_run_list to access the released object. Exploitation requires low-privilege local sysfs access and can crash the kernel or compromise kernel confidentiality and integrity.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel IIO sysfs triggers allows local users to corrupt kernel memory during trigger removal. The iio_sysfs_trigger_remove function frees the trigger without first synchronizing queued irq_work, allowing irq_work_run_list to access the released object. Exploitation requires low-privilege local sysfs access and can crash the kernel or compromise kernel confidentiality and integrity.

The record

CVE
CVE-2022-49685
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=3.7
  2. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <31ff3309b47d98313c61b8301bf595820cc3cc33
  3. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <4687c3f955240ca2a576bdc3f742d4d915b6272d
  4. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <4ef1e521be610b720daeb7cf899fedc7db0274c4
  5. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <5e39397d60dacc7f5d81d442c1c958eaaaf31128
  6. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <78601726d4a59a291acc5a52da1d3a0a6831e4e8
  7. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <b07a30a774b3c3e584a68dc91779c68ea2da4813
  8. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2
  9. Affected versionversion=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <fd5d8fb298a2866c337da635c79d63c3afabcaf7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.7; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <31ff3309b47d98313c61b8301bf595820cc3cc33; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <4687c3f955240ca2a576bdc3f742d4d915b6272d; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <4ef1e521be610b720daeb7cf899fedc7db0274c4; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <5e39397d60dacc7f5d81d442c1c958eaaaf31128; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <78601726d4a59a291acc5a52da1d3a0a6831e4e8; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <b07a30a774b3c3e584a68dc91779c68ea2da4813; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2; version=f38bc926d022ebd67baad6ac7fc22c95fbc6238c <fd5d8fb298a2866c337da635c79d63c3afabcaf7

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

CWE-416Use After Free

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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