CVE-2021-23970 describes a vulnerability in Firefox versions prior to 86, where context-specific code in a shared jump table could trigger assertions in multithreaded WebAssembly (Wasm) code. This medium-severity vulnerability (CVSS 6.5) can be exploited remotely with low attack complexity, potentially leading to high availability impact, though it does not affect confidentiality or integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion beyond a single mention, and it is not listed in CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 86.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.