CVE-2026-72301

Stale-byte copy via mismatched control size

Published Aug 15, 2026 · Updated Aug 15, 2026

Memory handling errors in Linux kernel 5.18 allow local users to copy stale bytes or truncate Sound Open Firmware control data. sof_ipc3_bytes_put() copies with the buffered old size instead of the incoming sof_abi_hdr.size, while sof_ipc3_bytes_get() checks max_size without subtracting the enclosing structure. Reachability requires local low-privilege access to an ASoC SOF IPC3 bytes control, and the documented result is stale or truncated control data.

CVSS severity7.8
High
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

Memory handling errors in Linux kernel 5.18 allow local users to copy stale bytes or truncate Sound Open Firmware control data. sof_ipc3_bytes_put() copies with the buffered old size instead of the incoming sof_abi_hdr.size, while sof_ipc3_bytes_get() checks max_size without subtracting the enclosing structure. Reachability requires local low-privilege access to an ASoC SOF IPC3 bytes control, and the documented result is stale or truncated control data.

The record

CVE
CVE-2026-72301
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.18
  2. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <0c4fbdaca225b97122b61b68c5353caa33a253c3
  3. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <0dce240145f47545d2e4b18c6d58033b83e1fd0e
  4. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <1f97760417b5faa60e9642fd0ed61eb17d0b1b39
  5. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <8bd715a9d882fe1993bb2aec5eff89fffa946592
  6. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <92f90917413bdd6078fefff6f6c83a07bf870b04
  7. Affected versionversion=544ac8858f249950b4d99c68e538cdc07300528f <ed4f758f34be4c32e02933ac4fa044589d9c1c16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=544ac8858f249950b4d99c68e538cdc07300528f <0c4fbdaca225b97122b61b68c5353caa33a253c3; version=544ac8858f249950b4d99c68e538cdc07300528f <0dce240145f47545d2e4b18c6d58033b83e1fd0e; version=544ac8858f249950b4d99c68e538cdc07300528f <1f97760417b5faa60e9642fd0ed61eb17d0b1b39; version=544ac8858f249950b4d99c68e538cdc07300528f <8bd715a9d882fe1993bb2aec5eff89fffa946592; version=544ac8858f249950b4d99c68e538cdc07300528f <92f90917413bdd6078fefff6f6c83a07bf870b04; version=544ac8858f249950b4d99c68e538cdc07300528f <ed4f758f34be4c32e02933ac4fa044589d9c1c16

Published CVSS scores

7.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

No sourced classifications are available.

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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