SB2026061066 - Use-after-free in Linux kernel spi driver
Published: June 10, 2026
Security Bulletin ID
SB2026061066
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-2026-46301)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the spi-topcliff-pch driver when handling driver unbind operations with pending queued work. A local user can trigger driver unbind while queued operations are still being flushed to cause a denial of service.
The issue occurs because DMA buffers may be released before the driver queue is fully flushed during device removal.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0e8e57f9737ea257634db1d152fc430a0788a3e1
- https://git.kernel.org/stable/c/36e58c436d2c2a797800427dc04d74ffd8b6ce1c
- https://git.kernel.org/stable/c/43334836b907adc21eab3079d2e6b26754468786
- https://git.kernel.org/stable/c/4ca90deeca1c7dd72c1c380ba8143565516def2d
- https://git.kernel.org/stable/c/8822980668c96b5aa251c1e2daec1873262b8f3f
- https://git.kernel.org/stable/c/9d72732fe70c11424bc90ed466c7ccfa58b42a9a
- https://git.kernel.org/stable/c/d50ef3553acbacce6f2843304d41d06dca358bb6
- https://git.kernel.org/stable/c/d79e92161b65832e0b8cad5f3d84d17e5cd7a970