CVE-2026-31720
usb: gadget: f_uac1_legacy: validate control request size
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate control request size f_audio_complete() copies req->length bytes into a 4-byte stack variable: u32 data = 0; memcpy(&data, req->buf, req->length); req->length is derived from the host-controlled USB request path, which can lead to a stack out-of-bounds write. Validate req->actual against the expected payload size for the supported control selectors and decode only the expected amount of data. This avoids copying a host-influenced length into a fixed-size stack object.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 1, 2026 |
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Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 557d1d4e862eccd0b74cc377b66de3e1e8d49605 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 21b11e8581285c6f10ef43d05df349d445f24273 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0d41772d98dcaf6c17e875b7d0ea0154ae1191ee 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c6da4fed7537aec19880c24f6c3a95065adb1406 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < be2d32f0c3fe333d14c0a9ca90328dacbc3e06b8 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8e5eb1d6e6a3d7bbea9c92132d0cda5793176426 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 26304d124e7f0383f8fe1168b5801a0ac7e16b1c 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6e0e34d85cd46ceb37d16054e97a373a32770f6c
Linux / Linux
All versions affected References
git.kernel.org: https://git.kernel.org/stable/c/557d1d4e862eccd0b74cc377b66de3e1e8d49605 git.kernel.org: https://git.kernel.org/stable/c/21b11e8581285c6f10ef43d05df349d445f24273 git.kernel.org: https://git.kernel.org/stable/c/0d41772d98dcaf6c17e875b7d0ea0154ae1191ee git.kernel.org: https://git.kernel.org/stable/c/c6da4fed7537aec19880c24f6c3a95065adb1406 git.kernel.org: https://git.kernel.org/stable/c/be2d32f0c3fe333d14c0a9ca90328dacbc3e06b8 git.kernel.org: https://git.kernel.org/stable/c/8e5eb1d6e6a3d7bbea9c92132d0cda5793176426 git.kernel.org: https://git.kernel.org/stable/c/26304d124e7f0383f8fe1168b5801a0ac7e16b1c git.kernel.org: https://git.kernel.org/stable/c/6e0e34d85cd46ceb37d16054e97a373a32770f6c