CVE-2026-93216Hinoki check available

Kernel panic via page-owner memcg_data race

Published Sep 24, 2026 · Updated Sep 24, 2026

Race condition in the Linux kernel page-owner subsystem allows local users to crash kernels built with CONFIG_DEBUG_VM enabled. print_page_owner_memcg() snapshots page->memcg_data but later re-reads it locklessly through page_memcg_check() and PageMemcgKmem() after the page can be freed and reallocated. Reading page-owner data with the debug configuration and page-owner feature active can trip VM_BUG_ON assertions, causing a kernel panic without reported data disclosure or modification.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Race condition in the Linux kernel page-owner subsystem allows local users to crash kernels built with CONFIG_DEBUG_VM enabled. print_page_owner_memcg() snapshots page->memcg_data but later re-reads it locklessly through page_memcg_check() and PageMemcgKmem() after the page can be freed and reallocated. Reading page-owner data with the debug configuration and page-owner feature active can trip VM_BUG_ON assertions, causing a kernel panic without reported data disclosure or modification.

The record

CVE
CVE-2026-93216
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=5.18
  2. Affected versionversion=fcf8935832b86d3437f00e732c6d0d4d2819d6a9 <46761406e14381dc35f498c247a87565b87ea2ef
  3. Affected versionversion=fcf8935832b86d3437f00e732c6d0d4d2819d6a9 <90f095b816e25c6a9e4446d299bac5007fdcb3df

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=fcf8935832b86d3437f00e732c6d0d4d2819d6a9 <46761406e14381dc35f498c247a87565b87ea2ef; version=fcf8935832b86d3437f00e732c6d0d4d2819d6a9 <90f095b816e25c6a9e4446d299bac5007fdcb3df

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1529System Shutdown/Reboot

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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