CVE-2026-97929
ALSA: usbusx2y: validate URB actual_length in interrupt callback
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ALSA: usbusx2y: validate URB actual_length in interrupt callback i_usx2y_in04_int() processes the interrupt URB data without checking urb->actual_length. A short transfer from a malfunctioning device would cause the handler to process uninitialized heap data from the kmalloc-allocated in04_buf, which is then copied to the mmap-accessible ctl_snapshot[] array. Fix by using kzalloc() for in04_buf to zero-initialize the buffer, and adding an actual_length check to skip processing on short transfers while still resubmitting the URB.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 25, 2026 |
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Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c156584999bf15118f523ef6c6fedc5b21f46bd9 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2770321b358658e0a39fe39ccf6a91ee97a81931 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8f5ef203abda9dd36b2af473c7b737d544f807bd
Linux / Linux
2.6.12
References
git.kernel.org: https://git.kernel.org/stable/c/c156584999bf15118f523ef6c6fedc5b21f46bd9 git.kernel.org: https://git.kernel.org/stable/c/b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d git.kernel.org: https://git.kernel.org/stable/c/2770321b358658e0a39fe39ccf6a91ee97a81931 git.kernel.org: https://git.kernel.org/stable/c/8f5ef203abda9dd36b2af473c7b737d544f807bd