CVE-2026-97910

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

ASoC: sprd: validate compress buffer sizes against fixed allocations

sprd_platform_compr_open() allocates the stage 0 IRAM buffer (32K data

area) and the stage 1 DDR buffer (2M data area) with fixed sizes, but

sprd_platform_compr_copy() derives all copy lengths from the user

controlled runtime->fragment_size and the write() count, never

comparing them against the physical buffer sizes. The compress core

only checks fragment_size * fragments for an u32 overflow in

snd_compress_check_input(), so a local user can configure a logical

buffer of up to ~4GB via SNDRV_COMPRESS_SET_PARAMS, far exceeding the

fixed allocations.

A fragment_size larger than the 32K IRAM data area makes the stage 0

copy_from_user() overflow past the IRAM allocation, and a buffer_size

larger than the 2M DDR buffer makes the wrapping copy at the end of

sprd_platform_compr_copy() write fully user controlled data past the

buffer. No SNDRV_PCM_TRIGGER

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References