hwrng: xilinx-trng - propagate timeout before any data is read (CVE-2026-93157) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93157

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

Answer in brief

CVE-2026-93157 records a Unknown severity vulnerability in hwrng: xilinx-trng - propagate timeout before any data is read. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=8979744aca8096ee5072798dfc1181606919b35d <62219775a07ce0bd8085852f3d1e2d772bf6fdec \|\| >=8979744aca8096ee5072798dfc1181606919b35d <bdc3b37a935f28c3e9eb2f6e889b4644d859fb08 \|\| >=8979744aca8096ee5072798dfc1181606919b35d <ba088974419326daf46c5dc03e2cf6ab6ab701f7	62219775a07ce0bd8085852f3d1e2d772bf6fdec, bdc3b37a935f28c3e9eb2f6e889b4644d859fb08, ba088974419326daf46c5dc03e2cf6ab6ab701f7
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 62219775a07ce0bd8085852f3d1e2d772bf6fdec if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.