CVE-2025-39959

System crash via incorrect ACP driver-data lookup

Published Oct 9, 2025 · Updated Oct 9, 2025

NULL pointer dereference in Linux kernel 6.15 through 6.16.8 allows local users to crash systems through the AMD ACP I2S driver. The affected functions read acp_chip_info from device platform data with dev_get_platdata(dev) instead of retrieving the parent device's driver data, leaving members stale or null. Reachability requires AMD ACP audio hardware and use of the affected driver; the bounded consequence is a kernel crash rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 6.15 through 6.16.8 allows local users to crash systems through the AMD ACP I2S driver. The affected functions read acp_chip_info from device platform data with dev_get_platdata(dev) instead of retrieving the parent device's driver data, leaving members stale or null. Reachability requires AMD ACP audio hardware and use of the affected driver; the bounded consequence is a kernel crash rather than data disclosure or modification.

The record

CVE
CVE-2025-39959
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2025Record 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=6.15
  2. Affected versionversion=e3933683b25e2cc94485da4909e3338e1a177b39 <65c5cfbd6d938f77a0df3c34855a4f7d8a61fd10
  3. Affected versionversion=e3933683b25e2cc94485da4909e3338e1a177b39 <d7871f400cad1da376f1d7724209a1c49226c456

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=e3933683b25e2cc94485da4909e3338e1a177b39 <65c5cfbd6d938f77a0df3c34855a4f7d8a61fd10; version=e3933683b25e2cc94485da4909e3338e1a177b39 <d7871f400cad1da376f1d7724209a1c49226c456

Published CVSS scores

5.5NVDCVSS: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

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-476NULL Pointer Dereference

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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