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CVE-2026-43427

Severity CVSS v4.0:
Pending analysis
Type:
CWE-125 Out-of-bounds Read
Publication date:
08/05/2026
Last modified:
20/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: class: cdc-wdm: fix reordering issue in read code path<br /> <br /> Quoting the bug report:<br /> <br /> Due to compiler optimization or CPU out-of-order execution, the<br /> desc-&gt;length update can be reordered before the memmove. If this<br /> happens, wdm_read() can see the new length and call copy_to_user() on<br /> uninitialized memory. This also violates LKMM data race rules [1].<br /> <br /> Fix it by using WRITE_ONCE and memory barriers.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.10
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.26.1 (including) 5.10.253 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.203 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.167 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.130 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.78 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.19 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.9 (excluding)
cpe:2.3:o:linux:linux_kernel:2.6.26:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.26:rc9:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools