Public Date:
1677636: CVE-2019-8343 nasm: use-after-free in paste_tokens in asm/preproc.c

The MITRE CVE dictionary describes this issue as:

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Find out more about CVE-2019-8343 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue affects the versions of nasm as shipped with Red Hat Enterprise Linux 6 and 7.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:

This issue did not affect the versions of nasm as shipped with Red Hat Enterprise Linux 5.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7.3
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 nasm Will not fix
Red Hat Enterprise Linux 7 nasm Affected
Red Hat Enterprise Linux 6 nasm Will not fix
Red Hat Enterprise Linux 5 nasm Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.
Last Modified

CVE description copyright © 2017, The MITRE Corporation