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Vulnerability record · CVE-2026-31475 · published 22 April 2026

CVE-2026-31475: Linux kernel double free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ASoC: sma1307: fix double free of devm_kzalloc() memory A previous change added NULL checks and cleanup for allocation failures in sma1307_setting_loaded(). However, the cleanup for mode_set entries is wrong. Those entries are allocated with devm_kzalloc(), so they are device-managed resources and must not be freed with kfree(). Manually freeing them in the error path can lead to a double free when devres later releases the same memory. Drop the manual kfree() loop and let devres handle the cleanup.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.0% CWE-415 · Double free
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: sma1307: fix double free of devm_kzalloc() memory A previous change added NULL checks and cleanup for allocation failures in sma1307_setting_loaded(). However, the cleanup for mode_set entries is wrong. Those entries are allocated with devm_kzalloc(), so they are device-managed resources and must not be freed with kfree(). Manually freeing them in the error path can lead to a double free when devres later releases the same memory. Drop the manual kfree() loop and let devres handle the cleanup.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1a82c3272626db9006f4c2cad3adf2916417aed6 Patch
https://git.kernel.org/stable/c/d472d1a52985211b92883bb64bbe710b45980190 Patch
https://git.kernel.org/stable/c/fe757092d2329c397ecb32f2bf68a5b1c4bd9193 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31475), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.