CVE-2026-97929ALSA: usbusx2y: validate URB actual_length in interrupt callback
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c156584999bf15118f523ef6c6fedc5b21f46bd9; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2770321b358658e0a39fe39ccf6a91ee97a81931; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8f5ef203abda9dd36b2af473c7b737d544f807bd | CNA record |
References
- https://git.kernel.org/stable/c/c156584999bf15118f523ef6c6fedc5b21f46bd9
- https://git.kernel.org/stable/c/b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d
- https://git.kernel.org/stable/c/2770321b358658e0a39fe39ccf6a91ee97a81931
- https://git.kernel.org/stable/c/8f5ef203abda9dd36b2af473c7b737d544f807bd
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.