CVE-2025-38329

KUnit failure via rounded-length firmware-info copy

Published Jul 10, 2025 · Updated May 11, 2026

Out-of-bounds read in Linux 6.14 through 6.15.3 allows local users to trigger a KASAN failure during the cs_dsp firmware KUnit test. In cs_dsp_mock_wmfw_add_info(), the code rounds the source length up to four bytes for allocation and then passes that larger length to memcpy, reading beyond the source string. Reachability requires executing the in-kernel KUnit test with a firmware-info string whose length is not divisible by four; no production driver path is identified.

CVSS severity7.1
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

Out-of-bounds read in Linux 6.14 through 6.15.3 allows local users to trigger a KASAN failure during the cs_dsp firmware KUnit test. In cs_dsp_mock_wmfw_add_info(), the code rounds the source length up to four bytes for allocation and then passes that larger length to memcpy, reading beyond the source string. Reachability requires executing the in-kernel KUnit test with a firmware-info string whose length is not divisible by four; no production driver path is identified.

The record

CVE
CVE-2025-38329
Published
Jul 10, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 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=5cf1b7b471803f7cc654a29ee16cb085ad69c097 <0000a2303ba78b6424ff15b5085b5f5098750a2e
  2. Affected versionversion=5cf1b7b471803f7cc654a29ee16cb085ad69c097 <d979b783d61f7f1f95664031b71a33afc74627b2
  3. Affected versionversion=6.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5cf1b7b471803f7cc654a29ee16cb085ad69c097 <0000a2303ba78b6424ff15b5085b5f5098750a2e; version=5cf1b7b471803f7cc654a29ee16cb085ad69c097 <d979b783d61f7f1f95664031b71a33afc74627b2; version=6.14

Published CVSS scores

7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
6.1SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
6.9SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

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 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-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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