SB2026102432 - Numeric Truncation Error in Linux kernel mmc core driver

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Main Vulnerability Database SB2026102432

SB2026102432 - Numeric Truncation Error in Linux kernel mmc core driver

Published: October 24, 2026

Security Bulletin ID SB2026102432
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Numeric Truncation Error (CVE-ID: CVE-2026-98884)

CWE-ID: CWE-197 - Numeric Truncation Error

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service by triggering a kernel crash.

The vulnerability exists due to integer truncation in the Linux kernel MMC core when an excessively large host-provided max_segs value is truncated to zero. A local user can trigger MMC request initialization with such an invalid host configuration to cause a zero-size scatter-gather allocation and a subsequent invalid memory access in sg_init_table(), crashing the kernel.


Remediation

Install update from vendor's website.

References