SB2026080752 - Use-after-free in Linux kernel usb usx2y

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-64601)

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 use-after-free in capture_urb_complete() when resubmitting USB request blocks. A local user can trigger stream stop, suspend, or disconnect handling after repeated resubmissions to cause a denial of service.

The issue stems from redundant anchoring of an already anchored URB, which corrupts the anchor's doubly-linked list and inflates the URB reference count.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/16f14f55141d4c55c3f321f93c328fff7cd6860a
• https://git.kernel.org/stable/c/5cff1529a2f9b3461a7f5a6e36a86682fc290534
• https://git.kernel.org/stable/c/ab1db64912428cdf06a4f9542e16e0575e9ad59f