Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-89996
Published: September 16, 2026
Vulnerability identifier: #VU150297
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89996
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to leak dma-buf file descriptors.
The vulnerability exists due to improper resource management in DMA_HEAP_IOCTL_ALLOC handling when copying allocation results to userspace fails. A local user can trigger a copy_to_user failure to leak dma-buf file descriptors.
Affected software
Linux kernel
How to mitigate CVE-2026-89996
Install security update from vendor's repository.