Use-after-free in Linux kernel - CVE-2026-89940
Published: September 17, 2026
Vulnerability identifier: #VU150347
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89940
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89940
Install security update from vendor's repository.