CVE-2023-53482

Local denial of service via leaked IOMMU groups

Published Oct 1, 2025 · Updated Oct 1, 2025

Resource leak in affected Linux kernel versions allows local users to exhaust kernel memory by triggering an IOMMU group allocation error. In iommu_group_alloc(), either failure while creating the IOMMU group's sysfs files returns without destroying the allocated group. A local low-privileged user must induce these error paths repeatedly; the unreclaimed groups can exhaust memory and interrupt the host.

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

What happened

Resource leak in affected Linux kernel versions allows local users to exhaust kernel memory by triggering an IOMMU group allocation error. In iommu_group_alloc(), either failure while creating the IOMMU group's sysfs files returns without destroying the allocated group. A local low-privileged user must induce these error paths repeatedly; the unreclaimed groups can exhaust memory and interrupt the host.

The record

CVE
CVE-2023-53482
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.11
  2. Affected versionversion=bc7d12b91bd35477fd650c4d72b61239de9d9066 <4c23124b45ee0aa895ed8d5d08871ae6b15ee336
  3. Affected versionversion=bc7d12b91bd35477fd650c4d72b61239de9d9066 <4daa861174d56023c2068ddb03de0752f07fa199
  4. Affected versionversion=bc7d12b91bd35477fd650c4d72b61239de9d9066 <8602fa38a63fc689eca29c8c586fac2d8a1f8739
  5. Affected versionversion=bc7d12b91bd35477fd650c4d72b61239de9d9066 <f119ef452e2d82d912797273cb790a86f1125b3e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=bc7d12b91bd35477fd650c4d72b61239de9d9066 <4c23124b45ee0aa895ed8d5d08871ae6b15ee336; version=bc7d12b91bd35477fd650c4d72b61239de9d9066 <4daa861174d56023c2068ddb03de0752f07fa199; version=bc7d12b91bd35477fd650c4d72b61239de9d9066 <8602fa38a63fc689eca29c8c586fac2d8a1f8739; version=bc7d12b91bd35477fd650c4d72b61239de9d9066 <f119ef452e2d82d912797273cb790a86f1125b3e

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS: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 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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