CVE-2025-38340

Out-of-bounds read via rounded-length string copy

Published Jul 10, 2025 · Updated May 11, 2026

An out-of-bounds read in Linux kernel 6.14 through 6.15.3 cs_dsp KUnit test code allows local users to disclose memory or crash the test. The cs_dsp_mock_bin_add_name_or_info helper copies the source string using a length rounded up to the destination allocation size, reading beyond the source terminator. Reachability requires local execution of the cs_dsp KUnit test, and the affected code resides in a test source file rather than a normal runtime path.

CVSS severity7.1
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Linux kernel 6.14 through 6.15.3 cs_dsp KUnit test code allows local users to disclose memory or crash the test. The cs_dsp_mock_bin_add_name_or_info helper copies the source string using a length rounded up to the destination allocation size, reading beyond the source terminator. Reachability requires local execution of the cs_dsp KUnit test, and the affected code resides in a test source file rather than a normal runtime path.

The record

CVE
CVE-2025-38340
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=6.14
  2. Affected versionversion=7c052c6615297ff32032105130cd5f02059f7ae4 <8f4cc454a0bb45b800bc7817c09c8f72e31901f3
  3. Affected versionversion=7c052c6615297ff32032105130cd5f02059f7ae4 <fe6446215bfad11cf3b446f38b28dc7708973c25

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=7c052c6615297ff32032105130cd5f02059f7ae4 <8f4cc454a0bb45b800bc7817c09c8f72e31901f3; version=7c052c6615297ff32032105130cd5f02059f7ae4 <fe6446215bfad11cf3b446f38b28dc7708973c25

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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 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

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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