greybus: audio: bound the topology section sizes against the fetched size

Summary

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.

Timeline

1. Sep 24, 2026, 3:52 PM UTCCVE published
2. Oct 19, 2026, 9:08 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in ba86de9f7b0d7903d2df5ea2373e34d8ca3fc43e; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in dd5593aee0a0fb353e1164aff7b65e563fe1f232; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in 6f764363b3173d805be11e59a8f23ecee2d420d5; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in 52daf9de692ebac813d110eb1e677dc0e1f4a5ab; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in d0f6eaba60705bacd9bb4ce48eab50ef3f546777; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in c9191f2e2f35f1209eb2dc24b31129dd47b48c16; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in cfcc5a41a9664eb68023aae4cd0d485b256bd7c7; From 184992e305f1de3a3d5fa446da3a2bc76be7c54a · fixed in 33d8c7b794d2a30637c9d3fcb478f1d3222bef1e

• Linux Linux

  4.9

• KernelLinux

  From 4.9.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8