Wiz
Vulnerability DatabaseCVE-2021-33458

CVE-2021-33458: 
NixOS vulnerability analysis and mitigation

Overview

An issue was discovered in yasm version 1.3.0 that involves a NULL pointer dereference in the find_cc() function within modules/preprocs/nasm/nasm-pp.c. The vulnerability was disclosed on July 26, 2022, and affects the YASM assembler software (NVD, GitHub Issue).

Technical details

The vulnerability is classified as a NULL pointer dereference issue with a CVSS v3.1 Base Score of 5.5 (MEDIUM). The attack vector is Local (AV:L), with Low attack complexity (AC:L), requiring no privileges (PR:N) but user interaction (UI:R). The scope is Unchanged (S:U), with no impact on confidentiality or integrity (C:N/I:N) but high impact on availability (A:H) (NVD).

Impact

The vulnerability can lead to a denial of service condition through application crash when processing specially crafted input files. The issue specifically affects the availability of the system while having no direct impact on confidentiality or integrity (NVD).

Mitigation and workarounds

The vulnerability affects YASM version 1.3.0, and users should update to a patched version when available. As of the latest reports, the vulnerability remains in a vulnerable state across multiple distributions (Debian Tracker).

Additional resources

Source: This report was generated using AI

Related NixOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-69264CRITICAL9.8
  • JavaScriptJavaScript
  • pnpm
NoYesJan 07, 2026
CVE-2025-69263HIGH8.8
  • JavaScriptJavaScript
  • pnpm
NoYesJan 07, 2026
CVE-2025-69262HIGH7.8
  • JavaScriptJavaScript
  • pnpm
NoYesJan 07, 2026
CVE-2026-21885MEDIUM6.5
  • NixOSNixOS
  • miniflux
NoYesJan 08, 2026
CVE-2026-22184MEDIUM4.6
  • NixOSNixOS
  • java-1.8.0-openjdk-demo
NoYesJan 07, 2026

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo