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Netfilter x_tables Heap Out-Of-Bounds Write / Privilege Escalation

Posted by deepcore on October 8, 2021 – 5:47 pm

A heap out-of-bounds write affecting Linux since version 2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a denial of service (via heap memory corruption) through user name space. Kernels up to and including 5.11 are vulnerable.


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