CVE-2026-93157

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

hwrng: xilinx-trng - propagate timeout before any data is read

xtrng_readblock32() polls for 16-byte chunks but returns the number of

bytes read even when the first poll times out. Its caller then treats a

zero return as a short successful read, and partial reads for full

32-byte blocks can make the tail copy use a fixed block offset rather

than the amount already produced.

Return the poll error when no data has been read, preserve partial

positive returns after some data is available, stop the generator on all

collection exits, and append tail bytes at the current output count.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References