CVE-2026-72015

System interruption via duplicate RMID free

Published Aug 15, 2026 · Updated Aug 15, 2026

Double-free in Linux kernel resctrl before 7.2 allows local users to interrupt system availability when resctrl is unmounted. During pseudo-locked group creation, its RMID is released and added to rmid_free_lru; rmdir_all_sub() later releases every group RMID without excluding that entry, inserting the same list node again. Access requires a configured pseudo-locked region and permission to unmount resctrl, and published material does not specify whether the resulting interruption is a hang, crash, or reboot.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-free in Linux kernel resctrl before 7.2 allows local users to interrupt system availability when resctrl is unmounted. During pseudo-locked group creation, its RMID is released and added to rmid_free_lru; rmdir_all_sub() later releases every group RMID without excluding that entry, inserting the same list node again. Access requires a configured pseudo-locked region and permission to unmount resctrl, and published material does not specify whether the resulting interruption is a hang, crash, or reboot.

The record

CVE
CVE-2026-72015
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.19
  2. Affected versionversion=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <52007bfdce5310e8c8a29849bfbfb188a1e50ca0
  3. Affected versionversion=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <9168176894332312c12ef052e784735dbf4ffe3f
  4. Affected versionversion=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <b2fe9e140aa94b2816aab7ebc692b543e418f5e3
  5. Affected versionversion=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <b9f089723aee892efc77c349ae47a6b452b293c4
  6. Affected versionversion=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <f7628eea9212e185a09df3aea603ca8580b8678d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <52007bfdce5310e8c8a29849bfbfb188a1e50ca0; version=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <9168176894332312c12ef052e784735dbf4ffe3f; version=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <b2fe9e140aa94b2816aab7ebc692b543e418f5e3; version=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <b9f089723aee892efc77c349ae47a6b452b293c4; version=e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0 <f7628eea9212e185a09df3aea603ca8580b8678d

Published CVSS scores

5.5OracleCVSS: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.

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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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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