Linux vulnerability

What happened

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.

Affected versions

Linux: 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before dd5593aee0a0fb353e1164aff7b65e563fe1f232 (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before 6f764363b3173d805be11e59a8f23ecee2d420d5 (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before 52daf9de692ebac813d110eb1e677dc0e1f4a5ab (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before d0f6eaba60705bacd9bb4ce48eab50ef3f546777 (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before c9191f2e2f35f1209eb2dc24b31129dd47b48c16 (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before cfcc5a41a9664eb68023aae4cd0d485b256bd7c7 (git); 184992e305f1de3a3d5fa446da3a2bc76be7c54a through before 33d8c7b794d2a30637c9d3fcb478f1d3222bef1e (git); 4.9 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.