CVE-2026-98884
kernel: mmc: core: Add validation for host-provided max_segs
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 26, 2026
Description
A flaw was found in the Linux kernel's MultiMediaCard (MMC) subsystem. Due to missing input validation, an excessively large segment value configured by a host driver can be truncated to zero during memory allocation. When this occurs, the kernel attempts to access invalid memory, resulting in a system crash and a Denial of Service (DoS).
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 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-1284 · Improper Validation of Specified Quantity in Input