CVE-2026-31475: ASoC: sma1307: fix double free of devm_kzalloc() memory

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-22 · updated 2026-06-17
Weakness: CWE-415

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.

Affected products

Linux kernel: from 6.14.9 before 6.15; from 6.15.1 before 6.18.21; from 6.19 before 6.19.11; 6.15, 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 (+2) — fixed in 6.15, 6.18.21, 6.19.11

How to fix

Upgrade to a fixed version: Linux kernel 6.15, 6.18.21, 6.19.11. Check the vendor advisory for mitigations.

References

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