CVE-2022-49675

Kernel panic via exported freed initialization symbol

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in affected Linux kernel branches beginning with 5.5 allows local users to trigger a kernel panic via a loadable module. tick_nohz_full_setup remains exported despite residing in freed .init.text memory, so a module can resolve and call the stale address. Exploitation requires the ability to load a kernel module that invokes the symbol, and the reported consequence is an availability-only kernel crash.

CVSS severity5.5
Medium
EPSS probability0.28%
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 affected Linux kernel branches beginning with 5.5 allows local users to trigger a kernel panic via a loadable module. tick_nohz_full_setup remains exported despite residing in freed .init.text memory, so a module can resolve and call the stale address. Exploitation requires the ability to load a kernel module that invokes the symbol, and the reported consequence is an availability-only kernel crash.

The record

CVE
CVE-2022-49675
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
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=5.5
  2. Affected versionversion=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <2390095113e98fc52fffe35c5206d30d9efe3f78
  3. Affected versionversion=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <c4ff3ffe0138234774602152fe67e3a898c615c6
  4. Affected versionversion=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <ea32b27e2f8c58c92bff5ecba7fcf64b97707089
  5. Affected versionversion=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <f4a80ec8c51d68be4b7a7830c510f75080c5e417

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <2390095113e98fc52fffe35c5206d30d9efe3f78; version=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <c4ff3ffe0138234774602152fe67e3a898c615c6; version=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <ea32b27e2f8c58c92bff5ecba7fcf64b97707089; version=ae9e557b5be2e285f48ee945d9c8faf75d4f6a66 <f4a80ec8c51d68be4b7a7830c510f75080c5e417

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS: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

CWE-908Use of Uninitialized Resource
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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