CVE-2026-23190

Local memory exhaustion via unfreed DMA state

Published Feb 14, 2026 · Updated Feb 14, 2026

A memory leak in the AMD ACP3x PDM DMA driver in affected Linux kernel releases allows local users to exhaust memory through audio capture. The acp_pdm_dma_close function clears the capture stream but fails to free the pdm_stream_instance stored in the PCM substream's private data. Exploitation requires access to PDM audio capture on a system with a compatible AMD Renoir or Cezanne APU, and repeated stream activity progressively consumes kernel memory until availability is lost.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the AMD ACP3x PDM DMA driver in affected Linux kernel releases allows local users to exhaust memory through audio capture. The acp_pdm_dma_close function clears the capture stream but fails to free the pdm_stream_instance stored in the PCM substream's private data. Exploitation requires access to PDM audio capture on a system with a compatible AMD Renoir or Cezanne APU, and repeated stream activity progressively consumes kernel memory until availability is lost.

The record

CVE
CVE-2026-23190
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, CWE-772, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=4a767b1d039a855c491c4853013804323c06f728 <0e0120214b5dcb0bf6b2171bb4e68e38968b2861
  2. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <279cb9180510f7e13c3a4dfde8c16a8fbc7c5709
  3. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <6d33640404968fe9f14a1252b337362b62fff490
  4. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <7f67ba5413f98d93116a756e7f17cd2c1d6c2bd6
  5. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <9f23800c7eed06cb8ccae8a225f5e3d421b0d4cc
  6. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <c9c14d2abe4c5546fcd3a7347fadc4aad2b308d8
  7. Affected versionversion=4a767b1d039a855c491c4853013804323c06f728 <d7ead6512650447a4cd6db774a2379acb259650c
  8. Affected versionversion=5.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4a767b1d039a855c491c4853013804323c06f728 <0e0120214b5dcb0bf6b2171bb4e68e38968b2861; version=4a767b1d039a855c491c4853013804323c06f728 <279cb9180510f7e13c3a4dfde8c16a8fbc7c5709; version=4a767b1d039a855c491c4853013804323c06f728 <6d33640404968fe9f14a1252b337362b62fff490; version=4a767b1d039a855c491c4853013804323c06f728 <7f67ba5413f98d93116a756e7f17cd2c1d6c2bd6; version=4a767b1d039a855c491c4853013804323c06f728 <9f23800c7eed06cb8ccae8a225f5e3d421b0d4cc; version=4a767b1d039a855c491c4853013804323c06f728 <c9c14d2abe4c5546fcd3a7347fadc4aad2b308d8; version=4a767b1d039a855c491c4853013804323c06f728 <d7ead6512650447a4cd6db774a2379acb259650c; version=5.8

Published CVSS scores

3.3Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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
CWE-772Missing Release of Resource after Effective Lifetime
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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