PT-2026-39088 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-06-05 · CVE-2026-43427

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description A reordering issue exists in the read code path of the usb class cdc-wdm. Due to compiler optimization or CPU out-of-order execution, the desc->length update may occur before the memmove operation. This can lead to the wdm read() function accessing the updated length and executing copy to user() on uninitialized memory, which also violates Linux Kernel Memory Model (LKMM) data race rules.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-43427

OESA-2026-2493

OESA-2026-2494

OESA-2026-2579

OESA-2026-2580

Affected Products

Linux Kernel

References · 130

• https://nvd.nist.gov/vuln/detail/CVE-2026-43503 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43033 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23318 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31778 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23317 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23360 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-39738 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43344 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31678 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23243 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31619 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68813 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23292 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-46181 · Security Note
• https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360 · Patch