xsk: validate metadata when processing requests

Answer in brief

CVE-2026-74707 records a Unknown severity vulnerability in xsk: validate metadata when processing requests. 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 22, 2026Updated Aug 22, 2026Source checked Aug 22, 2026First seen by HOL Aug 22, 2026Material review Aug 22, 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	>=ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <5fd121971912dee2f5af1efec64462ac722deb17 \|\| >=ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba \|\| >=ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <849b1664dbda1cf6c63e0fd4f9dec23782b8c851 \|\| d9d736c416c9a85f84e15435ba82a177262e745b \|\| >=6.14.2 <6.15	5fd121971912dee2f5af1efec64462ac722deb17, 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba, 849b1664dbda1cf6c63e0fd4f9dec23782b8c851, 6.15
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 5fd121971912dee2f5af1efec64462ac722deb17 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 22, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation.

Quoted source text, attributed separately from HOL analysis.