CVE-2026-93280 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators of systems using greybus audio modules should assess their exposure and prioritize verification of affected systems, especially those with untrusted or malicious topology blobs. Operators and security teams need to review configurations, verify system exposure, and apply patches or updates provided by the Linux kernel maintainers. Vulnerability management and platform security teams should monitor system

Why it matters

This vulnerability in the Linux kernel's greybus audio module can lead to out-of-bounds reads, potentially allowing malicious modules to access sensitive memory. Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems.

• Verify Linux kernel greybus audio module configurations to prevent potential out-of-bounds reads.
• Assess exposure of systems using greybus audio modules to untrusted or malicious topology blobs.
• Prioritize patching or updating Linux kernel greybus audio modules to prevent exploitation.
• Monitor system logs for signs of potential exploitation or anomalies in greybus audio module behavior.

Technical summary

The Linux kernel's greybus audio module is vulnerable to out-of-bounds reads due to unchecked section sizes in topology blobs. This can occur when a module provides a small topology size with large section sizes, causing parsing code to access memory beyond the allocated blob. The issue arises from gb_audio_gb_get_topology() fetching a topology blob of a module-supplied size, and gbaudio_tplg_parse_data() then walking it by adding the module-supplied size_dais, size_controls and size_widgets fields to form the control, widget and route section offsets. Those le32 sizes are never checked against the fetched blob, so a module reporting a small topology size but large section sizes makes the offsets point past the

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems, especially those using greybus audio modules.

Recommended defensive actions

• Review Linux kernel greybus audio module configurations and topology blobs for potential vulnerabilities.
• Verify system exposure to untrusted or malicious modules.
• Apply patches or updates provided by the Linux kernel maintainers.
• Monitor system logs for signs of potential exploitation.
• Perform vulnerability scanning to identify exposed systems.
• Implement compensating controls for exposed systems.
• Track and verify patch deployment for greybus audio modules.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description and CVSS score. However, specific version information and exploitation details are not provided in the corpus.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.