SB20260727370 - Use-after-free in Linux kernel spi driver
Published: July 27, 2026
Security Bulletin ID
SB20260727370
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-64221)
CWE-ID: CWE-416 - Use After Free
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 a use-after-free in the ti-qspi driver when handling DMA setup failure during probe. A local user can trigger a DMA setup failure and subsequent use of a released DMA channel pointer to cause a denial of service.
The issue occurs when the driver falls back to PIO mode after DMA setup failure.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e
- https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e
- https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6
- https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6
- https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d
- https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860
- https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19
- https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae