U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

CVE-2026-43427 Detail

Description

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


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b kernel.org
https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934 kernel.org
https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0 kernel.org
https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91 kernel.org
https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a kernel.org
https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173 kernel.org
https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360 kernel.org
https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43427
NVD Published Date:
05/08/2026
NVD Last Modified:
05/08/2026
Source:
kernel.org