ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get

Summary

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get In sof_ipc3_bytes_put(), the size used for the memcpy is derived from the old data->size already in the buffer, not the incoming new data's size field. If the new data has a different size, the copy length is wrong: it may truncate valid data or copy stale bytes. Similarly, sof_ipc3_bytes_get() checks data->size against max_size without accounting for the sizeof(struct sof_ipc_ctrl_data) offset of the flex array within the allocation. Fix bytes_put to validate and use the incoming data's sof_abi_hdr.size from ucontrol before copying. Fix bytes_get to subtract sizeof(*cdata) from the bounds check to match the actual available space.

Timeline

1. Aug 15, 2026, 5:55 AM UTCCVE published
2. Oct 16, 2026, 6:46 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 16, 2026, 6:55 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in 8bd715a9d882fe1993bb2aec5eff89fffa946592; From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in 0dce240145f47545d2e4b18c6d58033b83e1fd0e; From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in ed4f758f34be4c32e02933ac4fa044589d9c1c16; From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in 0c4fbdaca225b97122b61b68c5353caa33a253c3; From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in 92f90917413bdd6078fefff6f6c83a07bf870b04; From 544ac8858f249950b4d99c68e538cdc07300528f · fixed in 1f97760417b5faa60e9642fd0ed61eb17d0b1b39

• Linux Linux

  5.18

• KernelLinux

  From 5.18.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 6