Is CVE-2019-14842 actively exploited?

No active exploitation of CVE-2019-14842 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-14842 be exploited remotely?

Yes. CVE-2019-14842 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-14842?

CVE-2019-14842 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2019-14842

CRITICAL

CVE-2019-14842

CWE-681Published: November 26, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Structured reply is a feature of the newstyle NBD protocol allowing the server to send a reply in chunks. A bounds check which was supposed to test for chunk offsets smaller than the beginning of the request did not work because of signed/unsigned confusion. If one of these chunks contains a negative offset then data under control of the server is written to memory before the read buffer supplied by the client. If the read buffer is located on the stack then this allows the stack return address from nbd_pread() to be trivially modified, allowing arbitrary code execution under the control of the server. If the buffer is located on the heap then other memory objects before the buffer can be overwritten, which again would usually lead to arbitrary code execution.

NVD Source

Technical Analysis

CVE-2019-14842 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.