SB20260916122 - Missing Release of Resource after Effective Lifetime in Linux kernel dma-buf dma-heap DMA_HEAP_IOCTL_ALLOC handling
Published: September 16, 2026
Security Bulletin ID
SB20260916122
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-89996)
CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.