CVE-2026-90283

Hugepage unavailability via leaked mount reservations

Published Sep 17, 2026 · Updated Sep 17, 2026

Resource leakage in Linux kernel hugetlbfs allows local users to deny hugepage availability via failed mounts with min_size reservations. In hugetlbfs_fill_super(), root dentry creation failure frees the subpool with kfree() instead of hugepage_put_subpool(), leaving reservations charged. Exploitation requires mount access and this allocation failure; the disclosed consequence is resource depletion, not a demonstrated crash or reboot.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in Linux kernel hugetlbfs allows local users to deny hugepage availability via failed mounts with min_size reservations. In hugetlbfs_fill_super(), root dentry creation failure frees the subpool with kfree() instead of hugepage_put_subpool(), leaving reservations charged. Exploitation requires mount access and this allocation failure; the disclosed consequence is resource depletion, not a demonstrated crash or reboot.

The record

CVE
CVE-2026-90283
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-772
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.9Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime

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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