CVE-2026-98208
kernel: mmc: sdio_uart: fix xmit_fifo leak when the port table is full
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 6, 2026
Updated · October 9, 2026
Description
A flaw was found in the Linux kernel's SDIO UART driver. When registering a new device port while all available port slots are occupied, the driver fails to release an allocated transmit buffer during error handling. A local user could exploit this flaw by repeatedly triggering failed device attachments, resulting in a memory leak and a potential Denial of Service (DoS) due to memory exhaustion.
CVSS score applicability
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
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime