What’s Vulnerable › Vulnerabilities

CVE-2025-71192: ALSA: ac97: fix a double free in snd_ac97_controller_register()

• Severity: high (CVSS 7.0 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: 2026-02-04 · updated 2026-07-30

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: ac97: fix a double free in snd_ac97_controller_register() If ac97_add_adapter() fails, put_device() is the correct way to drop the device reference. kfree() is not required. Add kfree() if idr_alloc() fails and in ac97_adapter_release() to do the cleanup. Found by code review.

Affected products

• Linux kernel: 4.15 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/21f8bc5179bed91c3f946adb5e55d717b891960c
• https://git.kernel.org/stable/c/830988b6cf197e6dcffdfe2008c5738e6c6c3c0f
• https://git.kernel.org/stable/c/c80f9b3349a99a9d5b295f5bbc23f544c5995ad7
• https://git.kernel.org/stable/c/cb73d37ac18bc1716690ff5255a0ef1952827e9e
• https://git.kernel.org/stable/c/fcc04c92cbb5497ce67c58dd2f0001bb87f40396

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