SB20260815207 - Incorrect calculation in Linux kernel spi driver

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Main Vulnerability Database SB20260815207

SB20260815207 - Incorrect calculation in Linux kernel spi driver

Published: August 15, 2026

Security Bulletin ID SB20260815207
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) Incorrect calculation (CVE-ID: CVE-2026-74276)

CWE-ID: CWE-682 - Incorrect Calculation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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.

The vulnerability exists due to improper buffer size calculation in the xilinx SPI driver FIFO size detection logic when handling SPI transactions in irq mode. A local user can trigger an SPI transaction of the assumed FIFO size or more to cause a denial of service.

The issue can cause the driver to spin in a while loop forever after one received byte is lost because the RX FIFO is smaller than the incorrectly assumed size.


Remediation

Install update from vendor's website.

References