CVE-2026-97929

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c156584999bf15118f523ef6c6fedc5b21f46bd9affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2770321b358658e0a39fe39ccf6a91ee97a81931affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8f5ef203abda9dd36b2af473c7b737d544f807bdaffected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References