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Unrated severityCISA KEVNVD Advisory· Published Jan 30, 2023· Updated Oct 21, 2025

Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

CVE-2023-0266

Description

A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e

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Affected products

232

Patches

Vulnerability mechanics

References

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