CVE-2026-72300: ASoC: SOF: topology: validate vendor array size before parsing

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: topology: validate vendor array size before parsing sof_parse_token_sets() reads array->size while iterating over topology private data. The loop condition only checks that some data remains, so a malformed topology with a truncated trailing vendor array can make the parser read the size field before a full vendor-array header is available. Validate that the remaining private data contains a complete snd_soc_tplg_vendor_array header before reading array->size. The declared array size check also needs to remain signed. asize is an int, but sizeof(*array) has type size_t, so comparing them directly promotes negative asize values to unsigned and lets them pass the check, as reported in the stable review thread reference below. Cast sizeof(*array) to int when validating the declared array size. This rejects negative, zero and otherwise too-small sizes before the parser dispatches to the tuple-specific code.

Affected products

Linux kernel: from 6.6.136 before 6.6.145; from 6.12.83 before 6.12.97; from 6.18.24 before 6.18.40; from 6.19.14 before 6.20; 7.0 — fixed in 6.12.97, 6.18.40, 6.20, 6.6.145, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.12.97, 6.18.40, 6.20, 6.6.145. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-72300 or the next vulnerability affects your stack