CVE-2023-52730

Kernel memory exhaustion via leaked SDIO references

Published May 21, 2024 · Updated May 11, 2026

Resource leak in the Linux kernel SDIO core from 2.6.33 through 6.2-rc8 allows local users to interrupt service via failed initialization. When sdio_add_func() or sdio_init_func() fails before the function is marked present, sdio_remove_func() skips of_node_put() and put_device(), leaking device references. Repeated SDIO error paths are required; the demonstrated effect is accumulating unreferenced kernel objects and memory exhaustion, not code execution.

CVSS severity5.5
Medium
EPSS probability0.25%
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 the Linux kernel SDIO core from 2.6.33 through 6.2-rc8 allows local users to interrupt service via failed initialization. When sdio_add_func() or sdio_init_func() fails before the function is marked present, sdio_remove_func() skips of_node_put() and put_device(), leaking device references. Repeated SDIO error paths are required; the demonstrated effect is accumulating unreferenced kernel objects and memory exhaustion, not code execution.

The record

CVE
CVE-2023-52730
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE 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=2.6.33
  2. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <1e06cf04239e202248c8fa356bf11449dc73cfbd
  3. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <30716d9f0fa1766e522cf24c8a456244e4fc9931
  4. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <5c7858adada31dbed042448cff6997dd6efc472a
  5. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <605d9fb9556f8f5fb4566f4df1480f280f308ded
  6. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <761db46b29b496946046d8cb33c7ea6de6bef36e
  7. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <92ff03c2563c9b57a027c744750f3b7d2f261c58
  8. Affected versionversion=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <f855d31bb38d663c3ba672345d7cce9324ba3b72

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <1e06cf04239e202248c8fa356bf11449dc73cfbd; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <30716d9f0fa1766e522cf24c8a456244e4fc9931; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <5c7858adada31dbed042448cff6997dd6efc472a; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <605d9fb9556f8f5fb4566f4df1480f280f308ded; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <761db46b29b496946046d8cb33c7ea6de6bef36e; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <92ff03c2563c9b57a027c744750f3b7d2f261c58; version=3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5 <f855d31bb38d663c3ba672345d7cce9324ba3b72

Published CVSS scores

5.5NIST NVDCVSS: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

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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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.001OS Exhaustion Flood

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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