Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put In sof_ipc4_bytes_put(), the copy size is derived from the old data->size in the buffer rather than the incoming new data's size field from ucontrol. If the new data has a different size, the copy uses the wrong length: it may truncate valid data or copy stale bytes. Fix by validating and using the incoming data's sof_abi_hdr.size from ucontrol before copying.
References5
- git.kernel.org/stable/c/038406abde0d0883419ec89425ea941ec8bbef95
- git.kernel.org/stable/c/266f936db83aee6ca6473bbb06259bda52bf4fc3
- git.kernel.org/stable/c/3ad673e7139cf214afd24321a829aad6575f4163
- git.kernel.org/stable/c/4cf6a7ebbf8787393b158b2cc341723e5bebc4a8
- git.kernel.org/stable/c/fb4293173db2d474d8fbc0e5ecf4943e6df2b40e
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 11 November 2026
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