CVE-2022-50323

Local service interruption via page-state data race

Published Sep 15, 2025 · Updated Sep 15, 2025

A data race in the Linux kernel 5.15.68 through 5.15.76 and 6.0 through 6.0.6 allows local users to interrupt service. skb_append_pagefrags() calls skb_fill_page_desc(), which reads pfmemalloc state from a user-owned page while lru_add_fn can modify the same page state concurrently. Low-privileged local access is required; public records establish availability loss but do not specify whether the result is a hang, crash, or reboot.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A data race in the Linux kernel 5.15.68 through 5.15.76 and 6.0 through 6.0.6 allows local users to interrupt service. skb_append_pagefrags() calls skb_fill_page_desc(), which reads pfmemalloc state from a user-owned page while lru_add_fn can modify the same page state concurrently. Low-privileged local access is required; public records establish availability loss but do not specify whether the result is a hang, crash, or reboot.

The record

CVE
CVE-2022-50323
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=3261400639463a853ba2b3be8bd009c2a8089775 <228ebc41dfab5b5d34cd76835ddb0ca8ee12f513
  2. Affected versionversion=3261400639463a853ba2b3be8bd009c2a8089775 <847a2859814b31392340a2b16604b25afaa92dcc
  3. Affected versionversion=6.0
  4. Affected versionversion=6730c48ed6b0cd939fc9b30b2d621ce0b89bea83
  5. Affected versionversion=8527c9a6bf8e54fef0a8d3d7d8874a48c725c915 <92b4c5c3fa810212da20088bcc6c0a77fc8607bd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3261400639463a853ba2b3be8bd009c2a8089775 <228ebc41dfab5b5d34cd76835ddb0ca8ee12f513; version=3261400639463a853ba2b3be8bd009c2a8089775 <847a2859814b31392340a2b16604b25afaa92dcc; version=6.0; version=6730c48ed6b0cd939fc9b30b2d621ce0b89bea83; version=8527c9a6bf8e54fef0a8d3d7d8874a48c725c915 <92b4c5c3fa810212da20088bcc6c0a77fc8607bd

Published CVSS scores

5.5UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application or System Exploitation

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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