SB2026091725 - Use-after-free in Linux kernel iio driver
Published: September 17, 2026
Security Bulletin ID
SB2026091725
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-89940)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free in the iio_dma_fence implementation when a dma fence outlives its associated iio_dmabuf_priv object. A local user can cause a dma fence to access a lock after the associated object has been freed to execute arbitrary code.
Remediation
Install update from vendor's website.