CVE detail
CVE-2021-22555
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 6.9 · diversity 5.0 · KEV 25.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
1 source links · newest first
- U.S. CISA adds Oracle, Mozilla, Microsoft Windows, Linux Kernel, and Microsoft IE flaws to its Known Exploited Vulnerabilities catalogSecurity Affairs
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Oracle, Mozilla, Linux Kernel, Microsoft Windows, and Microsoft IE flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Oracle, Linux Kernel, Mozilla, Microsoft Windows, and Microsoft IE flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the descriptions for these flaws: This […]
newssecurityaffairs.comOct 7, 2025, 6:59 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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