CVE-2022-49800

Service interruption via tracing test buffer leaks

Published May 1, 2025 · Updated May 11, 2026

Memory leak in affected Linux kernel versions starting at 5.6 allows local users with module-loading privileges to consume kernel memory. test_gen_synth_cmd() and test_empty_synth_event() allocate 2,048-byte command buffers but release them only on failure, leaving successful module-initialization allocations unreachable. Triggering the leak requires permission to load the tracing test module; repeated loads can deplete kernel memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in affected Linux kernel versions starting at 5.6 allows local users with module-loading privileges to consume kernel memory. test_gen_synth_cmd() and test_empty_synth_event() allocate 2,048-byte command buffers but release them only on failure, leaving successful module-initialization allocations unreachable. Triggering the leak requires permission to load the tracing test module; repeated loads can deplete kernel memory and interrupt service.

The record

CVE
CVE-2022-49800
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 1, 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=5.6
  2. Affected versionversion=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <07ba4f0603aba288580866394f2916dfe55823a2
  3. Affected versionversion=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <0e5baaa181a052d968701bb9c5b1d55847f00942
  4. Affected versionversion=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <65ba7e7c241122ef0a9e61d1920f2ae9689aa796
  5. Affected versionversion=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <a4527fef9afe5c903c718d0cd24609fe9c754250

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <07ba4f0603aba288580866394f2916dfe55823a2; version=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <0e5baaa181a052d968701bb9c5b1d55847f00942; version=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <65ba7e7c241122ef0a9e61d1920f2ae9689aa796; version=9fe41efaca08416657efa8731c0d47ccb6a3f3eb <a4527fef9afe5c903c718d0cd24609fe9c754250

Published CVSS scores

5.5NIST NVDCVSS: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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