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Known Exploited Vulnerabilities Catalog
Malware and Vulnerabilities
October 07, 2025
cisa
A critical heap out-of-bounds write vulnerability, tracked as CVE-2021-22555, has been identified in the Linux Kernel. This flaw allows attackers to escalate privileges or cause a DoS condition via heap memory corruption through user namespaces.
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CVE-2021-22555
Linux Kernel
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