CVE-2022-49410

Local kernel compromise via tracing double free

Published Feb 26, 2025 · Updated Aug 5, 2026

Double free in Linux kernel tracing allows local users to corrupt kernel memory by writing a crafted histogram trigger. The init_var_ref() error path frees ref_field string members but leaves dangling pointers that destroy_hist_field() frees again during cleanup. Exploitation requires write access to a tracefs event trigger file and can disclose or overwrite kernel memory or crash the host.

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

What happened

Double free in Linux kernel tracing allows local users to corrupt kernel memory by writing a crafted histogram trigger. The init_var_ref() error path frees ref_field string members but leaves dangling pointers that destroy_hist_field() frees again during cleanup. Exploitation requires write access to a tracefs event trigger file and can disclose or overwrite kernel memory or crash the host.

The record

CVE
CVE-2022-49410
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=067fe038e70f6e64960d26a79c4df5f1413d0f13 <058cb6d86b9789377216c936506b346aaa1eb581
  2. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <37443b3508b8cce6832f8d25cb4550b2f7801f50
  3. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <4fdfb15e08598711dbf50daf56a33965232daf0e
  4. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <99696a2592bca641eb88cc9a80c90e591afebd0f
  5. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <bd83ff3bbfb003832481c9bff999d12385f396ae
  6. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <c27f744ceefadc7bbeb14233b6abc150ced617d2
  7. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <f8b383f83cb573152c577eca1ef101e89995b72a
  8. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <058cb6d86b9789377216c936506b346aaa1eb581; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <37443b3508b8cce6832f8d25cb4550b2f7801f50; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <4fdfb15e08598711dbf50daf56a33965232daf0e; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <99696a2592bca641eb88cc9a80c90e591afebd0f; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <bd83ff3bbfb003832481c9bff999d12385f396ae; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <c27f744ceefadc7bbeb14233b6abc150ced617d2; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <f8b383f83cb573152c577eca1ef101e89995b72a; version=4.17

Published CVSS scores

7.8LinuxCVSS: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-415Double 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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