CVE-2022-26522Public exploit

Kernel code execution via command-line length double fetch

Published May 8, 2026 · Updated May 8, 2026

Double-fetch race in the Avast and AVG Windows Anti Rootkit driver before 22.1 allows local users to execute code in kernel mode. At aswArPot+0xc4a3, the aswArPot.sys socket handler reads the user-controlled PEB command-line Length to size a buffer and again to copy data, allowing the value to change between operations. Low-privileged local code can win the race to corrupt kernel memory, causing privilege escalation or an operating-system crash.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-fetch race in the Avast and AVG Windows Anti Rootkit driver before 22.1 allows local users to execute code in kernel mode. At aswArPot+0xc4a3, the aswArPot.sys socket handler reads the user-controlled PEB command-line Length to size a buffer and again to copy data, allowing the value to change between operations. Low-privileged local code can win the race to corrupt kernel memory, causing privilege escalation or an operating-system crash.

The record

CVE
CVE-2022-26522
Published
May 8, 2026
Updated
May 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-367, T1068, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1068Exploitation for Privilege Escalation
T1499.004Application or System Exploitation

Public exploit references

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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