CVE-2022-50200

Local privilege escalation via unchecked policy serialization

Published Jun 18, 2025 · Updated Aug 5, 2026

Out-of-bounds write in the Linux kernel SELinux policy serializer allows local users to corrupt kernel memory through a policy-file read. The put_entry() helper passes an unchecked byte count to memcpy(), advances fp->data, and subtracts that count from fp->len without verifying the remaining buffer length. Access requires SELinux SECURITY__READ_POLICY; successful exploitation can disclose memory, elevate privileges, or crash the host.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux kernel SELinux policy serializer allows local users to corrupt kernel memory through a policy-file read. The put_entry() helper passes an unchecked byte count to memcpy(), advances fp->data, and subtracts that count from fp->len without verifying the remaining buffer length. Access requires SELinux SECURITY__READ_POLICY; successful exploitation can disclose memory, elevate privileges, or crash the host.

The record

CVE
CVE-2022-50200
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=2.6.37
  2. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <15ec76fb29be31df2bccb30fc09875274cba2776
  3. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <2dabe6a872a5744865372eb30ea51e8ccd21305a
  4. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <477722f31ad73aa779154d1d7e00825538389f76
  5. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <7363a69d8ca8f0086f8e1196c8ddaf0e168614b1
  6. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <90bdf50ae70c5571a277b5601e4f5df210831e0a
  7. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <9605f50157cae00eb299e1189a6d708c84935ad8
  8. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <adbfdaacde18faf6cd4e490764045375266b3fbd
  9. Affected versionversion=cee74f47a6baba0ac457e87687fdcf0abd599f0a <dedd558d9765b72c66e5a53948e9f5abc3ece1f6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.37; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <15ec76fb29be31df2bccb30fc09875274cba2776; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <2dabe6a872a5744865372eb30ea51e8ccd21305a; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <477722f31ad73aa779154d1d7e00825538389f76; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <7363a69d8ca8f0086f8e1196c8ddaf0e168614b1; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <90bdf50ae70c5571a277b5601e4f5df210831e0a; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <9605f50157cae00eb299e1189a6d708c84935ad8; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <adbfdaacde18faf6cd4e490764045375266b3fbd; version=cee74f47a6baba0ac457e87687fdcf0abd599f0a <dedd558d9765b72c66e5a53948e9f5abc3ece1f6

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/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-125Out-of-bounds Read
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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