CVE-2026-64328
kernel: usb: gadget: f_fs: Fix DMA fence leak
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 25, 2026
Updated · September 5, 2026
Description
A flaw was found in the Linux kernel's USB gadget subsystem. Specifically, a DMA (Direct Memory Access) fence leak exists in the f_fs module's ffs_dmabuf_transfer() function. This issue causes ffs_dma_fence objects to be allocated without their initial reference being properly released. Repeated exploitation of this flaw could lead to a gradual memory leak, potentially resulting in a denial of service due to system resource exhaustion.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime