CVE-2022-1882Public exploit

Local privilege escalation via watch-queue race

Published May 26, 2022 · Updated Aug 3, 2024

Use-after-free in Linux Kernel 5.18-rc8 allows local users to crash the system or execute arbitrary code via notification-pipe operations. A race between free_pipe_info() and post_one_notification() lets the latter dereference a freed watch_queue->pipe pointer after pipe teardown. Reachability requires local access and CONFIG_WATCH_QUEUE; successful exploitation grants root privileges, while failed attempts can crash the kernel.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel 5.18-rc8 allows local users to crash the system or execute arbitrary code via notification-pipe operations. A race between free_pipe_info() and post_one_notification() lets the latter dereference a freed watch_queue->pipe pointer after pipe teardown. Reachability requires local access and CONFIG_WATCH_QUEUE; successful exploitation grants root privileges, while failed attempts can crash the kernel.

The record

CVE
CVE-2022-1882
Published
May 26, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=Linux kernel 5.18-rc8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 5.18-rc8

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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