Vulnerability Analysis
Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE
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
CISA KEV
CVSS Base Score
8.3
HIGH
Exploitability:1.7
Impact Score:6.1
Temporal Score:-
EPSS:78.68%
Threat Intelligence Signals
CISA KEV
YES
KEV Date Added
2025-10-06
Ransomware Use
Unknown
KEV Due Date
2025-10-27
VulnCheck In-the-Wild
No
Nuclei Template
No
EPSS Score
78.684%
EPSS Percentile
99.5th pct
GHSA ID
—
GitHub Severity
—
SSVC Exploitation
—
SSVC Automatable
—
Vulnerability Class
—
Identity & Timeline
| Status | - |
| Assigning Authority | - |
| CVSS Version / Source | - |
| Reserved | - |
| Published | - |
| Patch Date (date_public) | - |
| Exploit DB Date | - |
| First GitHub PoC Date | - |
| Last Updated | - |
| Time to Patch (Days to fix) | - |
| Exploit Release Gap | - |
| PoC Release Gap | - |
| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| No affected products specified. | ||
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