hwrng: core - fix rng list on registration error (CVE-2026-93163) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93163

hwrng: core - fix rng list on registration error

Answer in brief

CVE-2026-93163 records a Unknown severity vulnerability in hwrng: core - fix rng list on registration error. 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	>=2bbb6983887fefc8026beab01198d30f47b7bd22 <de4f1bcb61a73cc896decdbd27d61a34add93b53 \|\| >=2bbb6983887fefc8026beab01198d30f47b7bd22 <cf293c9c7424de0d04b51367d07f40570ce80231 \|\| >=2bbb6983887fefc8026beab01198d30f47b7bd22 <bee8d1fcdc8f389b595b0a4cf6fe8440f499458a \|\| >=2bbb6983887fefc8026beab01198d30f47b7bd22 <3a5834db2b1ce25649f330e78efe1ccde78967fd \|\| 42802952a2725f85f7e36ee3b29593af5fe87197 \|\| >=4.9.320 <4.10	de4f1bcb61a73cc896decdbd27d61a34add93b53, cf293c9c7424de0d04b51367d07f40570ce80231, bee8d1fcdc8f389b595b0a4cf6fe8440f499458a, 3a5834db2b1ce25649f330e78efe1ccde78967fd, 4.10
Linux/Linuxgeneric	4.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to de4f1bcb61a73cc896decdbd27d61a34add93b53 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: core - fix rng list on registration error hwrng_register(rng) does the following: 1. Checks if rng has name and read methods set 2. Checks if the name already exists 3. Adds rng to global rng_list 4. May try to set rng to current_rng If step 4 fails, it returns an error. However, it does not remove the rng from rng_list, causing a dangling reference which can result in use-after-free if the caller frees rng, since registration failed. Add a list_del_init() cleanup step.

Quoted source text, attributed separately from HOL analysis.