PT-2026-39091 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-21 · CVE-2026-43430

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A race condition exists in the usb: yurex probe process. The bbu member of the descriptor is not set to the uninitialized value before the submission of the URB (USB Request Block) whose completion handler sets bbu. This creates a window where probing can overwrite data that has already been retrieved.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-43430

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/687d26d43a5aaf44323ce7d601cf242bb87e9559 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43430 · Vendor Advisory
• https://git.kernel.org/stable/c/3cec135415a89723e2d38e1c8cc5098203355965 · Patch
• https://git.kernel.org/stable/c/7a875c09899ba0404844abfd8f0d54cdc481c151 · Patch
• https://git.kernel.org/stable/c/a8b3b3d730acea1640bc89465f2832cf06a1e13a · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43430 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43430 · Security Note
• https://git.kernel.org/stable/c/af83e92c329f11139d5eea2b5b7b83c26c3f67e7 · Patch
• https://git.kernel.org/stable/c/939e3d17b843b0bae70467fef4481069d73c8520 · Patch
• https://ubuntu.com/security/CVE-2026-43430 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43430 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43430 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43430 · Security Note
• https://git.kernel.org/stable/c/a7934d7202a39c3160aa30521c382c7b744ae4a2 · Patch
• https://git.kernel.org/stable/c/a41d3d9202e951995cfac6248c565423079c71fa · Patch