net: libwx: fix the using of Rx buffer DMA

Answer in brief

CVE-2025-38533 records a Unknown severity vulnerability in net: libwx: fix the using of Rx buffer DMA. 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 Aug 16, 2025Updated Aug 5, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 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	>=3c47e8ae113a68da47987750d9896e325d0aeedd <027701180a7bcb64c42eab291133ef0c87b5b6c5 \|\| >=3c47e8ae113a68da47987750d9896e325d0aeedd <ba7c793f96c1c2b944bb6f423d7243f3afc30fe9 \|\| >=3c47e8ae113a68da47987750d9896e325d0aeedd <05c37b574997892a40a0e9b9b88a481566b2367d \|\| >=3c47e8ae113a68da47987750d9896e325d0aeedd <5fd77cc6bd9b368431a815a780e407b7781bcca0	027701180a7bcb64c42eab291133ef0c87b5b6c5, ba7c793f96c1c2b944bb6f423d7243f3afc30fe9, 05c37b574997892a40a0e9b9b88a481566b2367d, 5fd77cc6bd9b368431a815a780e407b7781bcca0
Linux/Linuxgeneric	6.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 027701180a7bcb64c42eab291133ef0c87b5b6c5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 16, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net: libwx: fix the using of Rx buffer DMA The wx_rx_buffer structure contained two DMA address fields: 'dma' and 'page_dma'. However, only 'page_dma' was actually initialized and used to program the Rx descriptor. But 'dma' was uninitialized and used in some paths. This could lead to undefined behavior, including DMA errors or use-after-free, if the uninitialized 'dma' was used. Althrough such error has not yet occurred, it is worth fixing in the code.

Quoted source text, attributed separately from HOL analysis.