CVE-2026-93039 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of the meson ASoC driver should assess exposure and prioritize verification of affected systems, especially those using the meson ASoC driver. This includes verifying Linux kernel version and meson ASoC driver usage, applying kernel patches to fix the vulnerability, and monitoring for potential exploitation attempts.

Why it matters

A use-after-free vulnerability exists in the Linux kernel's ASoC meson driver, which could lead to a double free in the probe error path. Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems.

• Verify Linux kernel version and meson ASoC driver usage
• Apply kernel patches to fix the vulnerability
• Monitor for potential exploitation attempts

Technical summary

The meson_card_reallocate_links function in the Linux kernel's ASoC meson driver has a use-after-free vulnerability. If the second krealloc() call fails, the card->dai_link still points to the block that krealloc() already freed, leading to a use-after-free and a double free in the probe error path. This issue affects Linux kernel maintainers, Linux distribution maintainers, and users of the meson ASoC driver. The vulnerability could lead to a double free in the probe error path, and Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems, especially those using the meson ASoC driver.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems, especially those using the meson ASoC driver.

Recommended defensive actions

• Review and apply the provided kernel patches to fix the vulnerability
• Verify the Linux kernel version and meson ASoC driver usage in your systems
• Monitor for potential exploitation attempts
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description and CVSS score. However, the exact affected versions and exploitation details are not specified, requiring further verification.

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.