CVE-2026-98211
Received Received - Intake

BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mmc: mmci: Fix use-after-free in busy-timeout work ux500_busy_complete() can queue ux500_busy_timeout_work for an R1b command, but mmci_remove() never cancels it. The work can subsequently dereference the devm-allocated mmci_host after it has been released. Mask the controller interrupts and disable the delayed work during removal. This drains any queued instance and stops an IRQ handler that is still in progress from queueing the work again once it has been disabled. This issue was found by an in-house static analysis tool.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-19
AI Q&A
2026-10-06
EPSS Evaluated
2026-10-18
NVD
CVE-2026-98211
EUVD
EUVD-2026-93139

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
Linux Linux b1a665932dc23cad0b8af2745cd9713f9e930d63
Linux Linux b1a665932dc23cad0b8af2745cd9713f9e930d63
Linux Linux b1a665932dc23cad0b8af2745cd9713f9e930d63
Linux Linux b1a665932dc23cad0b8af2745cd9713f9e930d63
Linux Linux 6.5

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's mmc (MultiMediaCard) driver, specifically in the mmci module for ux500 platforms. The issue occurs when the ux500_busy_complete() function queues a delayed work item (ux500_busy_timeout_work) for an R1b command, but the mmci_remove() function fails to cancel it. This can lead to the work item accessing freed memory after the mmci_host structure has been released.

Detection Guidance

This vulnerability is specific to the Linux kernel's MMC (MultiMediaCard) driver and may not have direct network detection methods. Check kernel logs for mmci-related errors or crashes using commands like 'dmesg | grep mmci' or 'journalctl -k | grep mmci'.

Impact Analysis

This vulnerability could cause system instability, crashes, or potential privilege escalation if exploited. It may lead to memory corruption, kernel panics, or unexpected behavior in systems using the affected mmci driver for MMC/SD card operations.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a low-level kernel memory management issue with no clear impact on data protection or privacy controls.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for this issue. Monitor kernel updates from your distribution and apply them promptly. No additional commands are required for mitigation beyond standard kernel updates.

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