xsk: require at least 16 bytes of TX metadata

Answer in brief

CVE-2026-74710 records a Unknown severity vulnerability in xsk: require at least 16 bytes of TX metadata. 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	>=341ac980eab90ac1f6c22ee9f9da83ed9604d899 <21b8536aee819792f1b4b38b9aacf2a073025d49 \|\| >=341ac980eab90ac1f6c22ee9f9da83ed9604d899 <642c6e73fce17fdca93a5793c4d22359fda866d7 \|\| >=341ac980eab90ac1f6c22ee9f9da83ed9604d899 <cfb9d2976b277e554e28c165e3eff4b4a8ea10bd \|\| >=341ac980eab90ac1f6c22ee9f9da83ed9604d899 <1bb30b181d9f0484e141f8411e15ed906d5c6780	21b8536aee819792f1b4b38b9aacf2a073025d49, 642c6e73fce17fdca93a5793c4d22359fda866d7, cfb9d2976b277e554e28c165e3eff4b4a8ea10bd, 1bb30b181d9f0484e141f8411e15ed906d5c6780
Linux/Linuxgeneric	6.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 21b8536aee819792f1b4b38b9aacf2a073025d49 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: require at least 16 bytes of TX metadata AF_XDP accepts a TX metadata length as small as eight bytes, but every supported request needs the flags plus at least one eight-byte request field. Such short metadata also lets the kernel read beyond the registered area. Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve compatibility with applications that do not use launch-time metadata.

Quoted source text, attributed separately from HOL analysis.