CVE-2023-53801

Service interruption via unreleased IOMMU DMA buffers

Published Dec 9, 2025 · Updated May 11, 2026

A DMA-buffer memory leak in Linux's Spreadtrum IOMMU driver allows attackers to deplete kernel memory through repeated domain use. The driver allocates a DMA buffer for its address-mapping table during domain attachment but fails to release it when the IOMMU domain is freed. Exploitation requires the Spreadtrum IOMMU driver and repeated domain attachment and teardown, eventually interrupting service through memory exhaustion.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A DMA-buffer memory leak in Linux's Spreadtrum IOMMU driver allows attackers to deplete kernel memory through repeated domain use. The driver allocates a DMA buffer for its address-mapping table during domain attachment but fails to release it when the IOMMU domain is freed. Exploitation requires the Spreadtrum IOMMU driver and repeated domain attachment and teardown, eventually interrupting service through memory exhaustion.

The record

CVE
CVE-2023-53801
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.13
  2. Affected versionversion=b23e4fc4e3faed0b8b604079c44a244da3ec941a <8745f3592ee4a7b49ede16ddd3f12a41ecaa23c9
  3. Affected versionversion=b23e4fc4e3faed0b8b604079c44a244da3ec941a <92c089a931fd3939cd32318cf4f54e69e8f51a19
  4. Affected versionversion=b23e4fc4e3faed0b8b604079c44a244da3ec941a <9afea57384d4ae7b2034593eac7fa76c7122762a
  5. Affected versionversion=b23e4fc4e3faed0b8b604079c44a244da3ec941a <d0a917fd5e3b3ed9d9306b4260ba684b982da9f3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=b23e4fc4e3faed0b8b604079c44a244da3ec941a <8745f3592ee4a7b49ede16ddd3f12a41ecaa23c9; version=b23e4fc4e3faed0b8b604079c44a244da3ec941a <92c089a931fd3939cd32318cf4f54e69e8f51a19; version=b23e4fc4e3faed0b8b604079c44a244da3ec941a <9afea57384d4ae7b2034593eac7fa76c7122762a; version=b23e4fc4e3faed0b8b604079c44a244da3ec941a <d0a917fd5e3b3ed9d9306b4260ba684b982da9f3

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.

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

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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