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Case File

CVE-2021-29986

HIGH · CVSS 8.1 EPSS 1.26% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-17 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.1. It affects Linux, Firefox. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-29986
Severity
HIGH
CVSS
8.1
EPSS
1.26%
Linux Firefox

Original NVD Description

A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. *Note: This issue only affected Linux operating systems. Other operating systems are unaffected.* This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

Related CVEs

Other vulnerabilities affecting the same vendor(s)