SB20260727271 - Improper control of a resource through its lifetime in Linux kernel spi driver

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Main Vulnerability Database SB20260727271

SB20260727271 - Improper control of a resource through its lifetime in Linux kernel spi driver

Published: July 27, 2026

Security Bulletin ID SB20260727271
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-64303)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause memory corruption or trigger a use-after-free.

The vulnerability exists due to improper resource shutdown in the fsl-lpspi dma transfer error path in drivers/spi/spi-fsl-lpspi.c when preparing a tx dma descriptor after the rx dma channel has already been submitted and issued. A local user can trigger a tx prepare failure during a spi dma transfer to cause memory corruption or trigger a use-after-free.

The issue occurs because the spi core unmaps dma buffers after the error is returned while the rx dma engine may continue writing to those buffers.


Remediation

Install update from vendor's website.

References