SB20261007156 - Use-after-free in Linux kernel mmc host driver

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Main Vulnerability Database SB20261007156

SB20261007156 - Use-after-free in Linux kernel mmc host driver

Published: October 7, 2026

Security Bulletin ID SB20261007156
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-98212)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger access to freed kernel memory.

The vulnerability exists due to use-after-free in the MMC host software queue retry work handler when processing pending retry work after driver removal. A local user can trigger execution of pending retry work after its associated allocation has been released to trigger access to freed kernel memory.

Retry work is queued when request_atomic() returns -EBUSY. The sdhci-sprd driver is the only identified consumer implementing request_atomic().


Remediation

Install update from vendor's website.

References