SB2026080769 - Use-after-free in Linux kernel can usb driver
Published: August 7, 2026
Security Bulletin ID
SB2026080769
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-64585)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in esd_usb_disconnect() and unlink_all_urbs() when handling USB device disconnect events. A local user can trigger a device disconnect condition to cause a denial of service.
The issue occurs because per-netdev private data embedded in the net_device allocation is dereferenced after free during teardown.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/5832c55b3c824ba2fe9c36ac3c411baddcce053e
- https://git.kernel.org/stable/c/765ba1c91823a296447528791b89a6504947fd5c
- https://git.kernel.org/stable/c/a02e1d8f191324583599544d54e59e6a2b74bb0e
- https://git.kernel.org/stable/c/a3314f10369df70925140f59bbe069718f65a0b9
- https://git.kernel.org/stable/c/aa1d005927db38af783c1a4a8a00a39e0229ab2d
- https://git.kernel.org/stable/c/c43122fef328a70045fe7621c06de6b2b8e19264