CVE-2026-89943

Undefined behavior via unchecked ACPI property result

Published Sep 16, 2026 · Updated Sep 16, 2026

Improper error handling in Linux 6.12 allows attackers to trigger undefined behavior through an absent or invalid ACPI codec property. loongson_card_parse_acpi() ignores the result from device_property_read_string() and later uses an uninitialized codec-dai-name pointer. Reachability requires a Loongson ASoC device whose firmware omits that property or provides an invalid value; no more specific consequence is published.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper error handling in Linux 6.12 allows attackers to trigger undefined behavior through an absent or invalid ACPI codec property. loongson_card_parse_acpi() ignores the result from device_property_read_string() and later uses an uninitialized codec-dai-name pointer. Reachability requires a Loongson ASoC device whose firmware omits that property or provides an invalid value; no more specific consequence is published.

The record

CVE
CVE-2026-89943
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=6.12
  2. Affected versionversion=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <0eb0e3c623ac1da8b85d518043fef7660af7805d
  3. Affected versionversion=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <4e580d84a638f007b5b68d50d7633de502f325e7
  4. Affected versionversion=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <682c123cef455545f48ecbe74b3872fa303bf58f
  5. Affected versionversion=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <bb1602908c67db7197ab001638573262bccc6ca2

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <0eb0e3c623ac1da8b85d518043fef7660af7805d; version=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <4e580d84a638f007b5b68d50d7633de502f325e7; version=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <682c123cef455545f48ecbe74b3872fa303bf58f; version=ddb538a3004b10a04a14a0d275c5f52a8d161e80 <bb1602908c67db7197ab001638573262bccc6ca2

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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