Description
In the Linux kernel, the following vulnerability has been resolved: greybus: audio: bound the topology section sizes against the fetched size gb_audio_gb_get_topology() fetches a topology blob of a module-supplied size, and gbaudio_tplg_parse_data() then walks it by adding the module-supplied size_dais, size_controls and size_widgets fields to form the control, widget and route section offsets. Those le32 sizes are never checked against the fetched blob, so a module reporting a small topology size but large section sizes makes the offsets point past the allocation, and parsing reads out of bounds. Reject a topology whose section sizes do not fit within the fetched size before it is parsed.
References8
- git.kernel.org/stable/c/33d8c7b794d2a30637c9d3fcb478f1d3222bef1e
- git.kernel.org/stable/c/52daf9de692ebac813d110eb1e677dc0e1f4a5ab
- git.kernel.org/stable/c/6f764363b3173d805be11e59a8f23ecee2d420d5
- git.kernel.org/stable/c/ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e
- git.kernel.org/stable/c/c9191f2e2f35f1209eb2dc24b31129dd47b48c16
- git.kernel.org/stable/c/cfcc5a41a9664eb68023aae4cd0d485b256bd7c7
- git.kernel.org/stable/c/d0f6eaba60705bacd9bb4ce48eab50ef3f546777
- git.kernel.org/stable/c/dd5593aee0a0fb353e1164aff7b65e563fe1f232
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 25 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.