CVE-2025-40097

Kernel crash via unchecked ALSA error pointer

Published Oct 30, 2025 · Updated Oct 30, 2025

Error-pointer dereference in the ALSA HDA component manager in Linux 5.17 allows attackers to crash the kernel via allocation failure. hda_component_manager_init passes an ERR_PTR(-ENOMEM) match pointer into component_master_add_with_match, where component_match_realloc dereferences it without an error check. The public record identifies no attacker-controlled trigger or required privileges; reaching the allocation-failure path during component initialization causes a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Error-pointer dereference in the ALSA HDA component manager in Linux 5.17 allows attackers to crash the kernel via allocation failure. hda_component_manager_init passes an ERR_PTR(-ENOMEM) match pointer into component_master_add_with_match, where component_match_realloc dereferences it without an error check. The public record identifies no attacker-controlled trigger or required privileges; reaching the allocation-failure path during component initialization causes a kernel crash.

The record

CVE
CVE-2025-40097
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 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=5.17
  2. Affected versionversion=ae7abe36e352eddf8e30d3b1ea3fb402514ba13b <1cf11d80db5df805b538c942269e05a65bcaf5bc
  3. Affected versionversion=ae7abe36e352eddf8e30d3b1ea3fb402514ba13b <47d1b9ca923b55c3f407788f1f15b04957e0e027

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=ae7abe36e352eddf8e30d3b1ea3fb402514ba13b <1cf11d80db5df805b538c942269e05a65bcaf5bc; version=ae7abe36e352eddf8e30d3b1ea3fb402514ba13b <47d1b9ca923b55c3f407788f1f15b04957e0e027

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
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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