CVE-2022-48848

Kernel warning via duplicate tracepoint unregistration

Published Jul 16, 2024 · Updated May 11, 2026

Improper tracepoint teardown in Linux 5.16 through 5.16.14 allows local users with tracing control to trigger a kernel warning. The osnoise_workload_stop path unregisters tracepoint callbacks after tracing was already disabled because it does not check trace_osnoise_callback_enabled before deactivation. Reachability requires write access to tracefs controls; the published reproducer demonstrates a warning rather than a crash or code execution.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper tracepoint teardown in Linux 5.16 through 5.16.14 allows local users with tracing control to trigger a kernel warning. The osnoise_workload_stop path unregisters tracepoint callbacks after tracing was already disabled because it does not check trace_osnoise_callback_enabled before deactivation. Reachability requires write access to tracefs controls; the published reproducer demonstrates a warning rather than a crash or code execution.

The record

CVE
CVE-2022-48848
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE 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=2fac8d6486d5c34e2ec7028580142b8209da3f92 <4e10787d18379d9b296290c2288097feddef16d4
  2. Affected versionversion=2fac8d6486d5c34e2ec7028580142b8209da3f92 <f0cfe17bcc1dd2f0872966b554a148e888833ee9
  3. Affected versionversion=5.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2fac8d6486d5c34e2ec7028580142b8209da3f92 <4e10787d18379d9b296290c2288097feddef16d4; version=2fac8d6486d5c34e2ec7028580142b8209da3f92 <f0cfe17bcc1dd2f0872966b554a148e888833ee9; version=5.16

Published CVSS scores

7.8CanonicalCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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