Random K-Malic Caches: A New Mitigation Technique for Linux Bugs

Last week we brought you several Windows bugs, this week we are talking Linux kernel vulnerabilities and exploitation. We start off looking at a weird but cool CPU bug, Reptar, then we get into nftables, io_uring, and talk about a newer mitigations hitting Linux 6.6 that randomizes the caches allocations end up in.

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/226.html

[00:00:00] Introduction

[00:00:21] Reptar

[00:11:56] One shot, Triple kill: Pwning all three Google kernelCTF instances with a single 1-day Linux vulnerability

[00:31:09] Conquering the memory through io_uring - Analysis of CVE-2023-2598

[00:38:00] Exploring Linux's New Random Kmalloc Caches

[00:48:09] ThinkstScapes Quarterly - 2023.Q3

[00:49:34] CacheWarp

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