CVE-2022-50170

Service interruption via KUnit allocation-failure memory leak

Published Jun 18, 2025 · Updated May 23, 2026

Memory leak in Linux KUnit 5.17.14 through 5.17.x, 5.18.3 through 5.18.17, and 5.19 allows local users to interrupt service. In lib/kunit/executor.c, kunit_filter_tests keeps the copied suite allocated when the subsequent filtered-array allocation fails instead of freeing it on that error path. Reachability requires a locally initiated KUnit test run with filtering and a specific allocation failure; repeated leaked copies can exhaust kernel memory.

CVSS severity5.5
Medium
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

Memory leak in Linux KUnit 5.17.14 through 5.17.x, 5.18.3 through 5.18.17, and 5.19 allows local users to interrupt service. In lib/kunit/executor.c, kunit_filter_tests keeps the copied suite allocated when the subsequent filtered-array allocation fails instead of freeing it on that error path. Reachability requires a locally initiated KUnit test run with filtering and a specific allocation failure; repeated leaked copies can exhaust kernel memory.

The record

CVE
CVE-2022-50170
Published
Jun 18, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=5.17.14 <5.18
  2. Affected versionversion=5.18.3 <5.18.18
  3. Affected versionversion=5.19
  4. Affected versionversion=80cf4932c2545bc231e933d869511008c36af1e0
  5. Affected versionversion=a02353f491622e49c7ddedc6a6dc4f1d6ed2150a <7d69764fa3442c7615a75c6b5c02eaa1f274bccf
  6. Affected versionversion=a02353f491622e49c7ddedc6a6dc4f1d6ed2150a <94681e289bf5d10c9db9db143d1a22d8717205c5
  7. Affected versionversion=bd8b222a0002872bb229f6c755672a093ef93ea4 <a8a7e3ced362b88b659ab54239990196ff975982

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17.14 <5.18; version=5.18.3 <5.18.18; version=5.19; version=80cf4932c2545bc231e933d869511008c36af1e0; version=a02353f491622e49c7ddedc6a6dc4f1d6ed2150a <7d69764fa3442c7615a75c6b5c02eaa1f274bccf; version=a02353f491622e49c7ddedc6a6dc4f1d6ed2150a <94681e289bf5d10c9db9db143d1a22d8717205c5; version=bd8b222a0002872bb229f6c755672a093ef93ea4 <a8a7e3ced362b88b659ab54239990196ff975982

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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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