ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0c4fbdaca225b97122b61b68c5353caa33a253c3https://git.kernel.org/stable/c/0dce240145f47545d2e4b18c6d58033b83e1fd0ehttps://git.kernel.org/stable/c/1f97760417b5faa60e9642fd0ed61eb17d0b1b39https://git.kernel.org/stable/c/8bd715a9d882fe1993bb2aec5eff89fffa946592https://git.kernel.org/stable/c/92f90917413bdd6078fefff6f6c83a07bf870b04https://git.kernel.org/stable/c/ed4f758f34be4c32e02933ac4fa044589d9c1c16