CVE-2026-31475

Kernel memory corruption via device-managed double free

Published Apr 22, 2026 · Updated Apr 22, 2026

Double free in the SMA1307 ASoC codec driver in affected Linux Kernel releases allows local users to corrupt kernel memory via a reset ioctl. In sma1307_setting_loaded(), an allocation-failure cleanup loop passes devm_kzalloc()-managed mode_set entries to kfree(), so devres later frees the same memory again. The path requires an SMA1307 device, settings firmware, local low-privileged access to the ALSA Reset Switch ioctl, and attacker-induced memory pressure; the bounded result is kernel memory corruption.

CVSS severity7.8
High
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

Double free in the SMA1307 ASoC codec driver in affected Linux Kernel releases allows local users to corrupt kernel memory via a reset ioctl. In sma1307_setting_loaded(), an allocation-failure cleanup loop passes devm_kzalloc()-managed mode_set entries to kfree(), so devres later frees the same memory again. The path requires an SMA1307 device, settings firmware, local low-privileged access to the ALSA Reset Switch ioctl, and attacker-induced memory pressure; the bounded result is kernel memory corruption.

The record

CVE
CVE-2026-31475
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-415, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <1a82c3272626db9006f4c2cad3adf2916417aed6
  2. Affected versionversion=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <d472d1a52985211b92883bb64bbe710b45980190
  3. Affected versionversion=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <fe757092d2329c397ecb32f2bf68a5b1c4bd9193
  4. Affected versionversion=6.15
  5. Affected versionversion=f8434b8ba437d3f6cbcd9ffe8405bd16ed28fc5c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <1a82c3272626db9006f4c2cad3adf2916417aed6; version=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <d472d1a52985211b92883bb64bbe710b45980190; version=0ec6bd16705fe21d6429d6b8f7981eae2142bba8 <fe757092d2329c397ecb32f2bf68a5b1c4bd9193; version=6.15; version=f8434b8ba437d3f6cbcd9ffe8405bd16ed28fc5c

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-415Double Free
T1068Exploitation for Privilege Escalation

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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