CVE-2022-50640

A flaw in the Linux kernel mmc core driver was discovered that could lead to a kernel panic and memory corruption when a non-standard SDIO card is removed. The Vulnerability arises because SDIO tuples are only allocated for standard SDIO cards, resulting in an inconsistent reference count for the device structure. When the non-standard card is removed, the reference counter is decremented without the corresponding earlier increment, potentially triggering use of freed memory or panic conditions. A local user with access to the affected subsystem could trigger this behavior, causing the kernel to crash.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.