CVE-2022-49493

Use-after-free via teardown work requeue

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in the rt5645 ASoC codec driver in Linux allows local users to corrupt kernel memory during concurrent device removal. rt5645_i2c_remove() cancels jack_detect_work before synchronously deleting btn_check_timer, so rt5645_btn_check_callback() can requeue the canceled work after its owning device state is freed. The race requires local device-removal activity on a system using the rt5645 codec; public records establish the use-after-free but do not document a reliable exploit outcome.

CVSS severity7.8
High
EPSS probability0.26%
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 the rt5645 ASoC codec driver in Linux allows local users to corrupt kernel memory during concurrent device removal. rt5645_i2c_remove() cancels jack_detect_work before synchronously deleting btn_check_timer, so rt5645_btn_check_callback() can requeue the canceled work after its owning device state is freed. The race requires local device-removal activity on a system using the rt5645 codec; public records establish the use-after-free but do not document a reliable exploit outcome.

The record

CVE
CVE-2022-49493
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
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=4.13
  2. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <061a6159cea583f1155f67d1915917a6b9282662
  3. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <0941150100173d4eaf3fe08ff4b16740e7c3026f
  4. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <1a5a3dfd9f172dcb115072f0aea5e27d3083c20e
  5. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <236d29c5857f02e0a53fdf15d3dce1536c4322ce
  6. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <2def44d3aec59e38d2701c568d65540783f90f2f
  7. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <453f0920ffc1a28e28ddb9c3cd5562472b2895b0
  8. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <88c09e4812d72c3153afc8e5a45ecac2d0eae3ff
  9. Affected versionversion=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <abe7554da62cb489712a54de69ef5665c250e564

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.13; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <061a6159cea583f1155f67d1915917a6b9282662; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <0941150100173d4eaf3fe08ff4b16740e7c3026f; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <1a5a3dfd9f172dcb115072f0aea5e27d3083c20e; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <236d29c5857f02e0a53fdf15d3dce1536c4322ce; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <2def44d3aec59e38d2701c568d65540783f90f2f; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <453f0920ffc1a28e28ddb9c3cd5562472b2895b0; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <88c09e4812d72c3153afc8e5a45ecac2d0eae3ff; version=a6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 <abe7554da62cb489712a54de69ef5665c250e564

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
T1068Exploitation for Privilege Escalation

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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