CVE-2026-80526

Quoted from the kernel CNA's own scoring file, word for word. A highlighted metric carries the most severe value CVSS v3.1 defines for it, which is what pushes the score up. source

AV:LAttack vector, local

Exploitation requires a local attacker to issue SNDRV_CTL_IOCTL_ELEM_WRITE on /dev/snd/controlC*; the bug is in the ALSA SoC mixer put callback, not in any network-facing kernel service.

AC:LAttack complexity, low

The attacker fully controls the integer volume value passed to tas2562_volume_control_put(); on default kernels without CONFIG_SND_CTL_INPUT_VALIDATION, out-of-range values reliably trigger the out-of-bounds lookup without races or external conditions.

PR:LPrivileges required, low

Writing the Digital Volume Control requires only access to the ALSA control device node, typically granted to unprivileged users in the audio group via standard 0660 permissions, not root in the init namespace.

UI:NUser interaction, none

No victim interaction is required; the attacker directly sets the mixer control through the ALSA ioctl interface.

S:UScope, unchanged

Impact is confined to the kernel audio driver and attached TAS2562 amplifier on the same host; it does not cross VM, container, or IOMMU security boundaries.

C:HConfidentiality impact, high

Missing index validation allows an out-of-bounds read of the static float_vol_db_lookup[] table in kernel memory; the attacker controls the index via the supplied volume value, leaking adjacent kernel .rodata contents.

I:HIntegrity impact, high

The out-of-bounds 32-bit value read from kernel memory is written into the TAS2562 DVC coefficient registers, allowing attacker-controlled arbitrary modification of digital amplifier gain on embedded and mobile speaker systems.

A:HAvailability impact, high

Large out-of-bounds indices can fault on kernel memory access, and programming arbitrary DVC coefficients can overdrive the TAS2562 amplifier causing thermal shutdown, speaker damage, or loss of audio on affected devices.