Andreas Christoforou @Andreas_Ch_
“Everyone sees what you appear to be, few experience what you really are.” chandreas.github.io 127.0.0.1 Joined October 2012-
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I posted a short blog about how a Samsung GPU vulnerability (CVE-2025-21479) can be leveraged for an LPE on affected devices xploitbengineer.github.io/CVE-2025-21479
More HW security goodness from Arm: community.arm.com/arm-community-… vMTE (Virtual Memory Tagging) allows to use MTE in a more flexible way, consuming less RAM. POE2 allows to build efficient in-process sandboxes and isolation. More-or-less improvement over x86 Memory Protection Keys.
First mention of x86 memory tagging (aka MTE) by both Intel and AMD (codename ChkTag): community.intel.com/t5/Blogs/Tech-… amd.com/en/blogs/2025/… 🤘🤘🤘
So LDM will enable MTE in WebContent? 🤔
NEW macOS 26.0 🥫🍝 sauce! 🎉 xnu: github.com/apple-oss-dist… dyld: github.com/apple-oss-dist… objc4: github.com/apple-oss-dist… Security: github.com/apple-oss-dist… Libsystem: github.com/apple-oss-dist… Libc: github.com/apple-oss-dist… - this post was generated by `ipsw` 🤖
High level diff of iOS 26.1 beta3 vs. iOS 26.1 beta4 🎉 github.com/blacktop/ipsw-…
iOS 26.1 beta4
Exploit and mini writeup for CVE-2025-5419. github.com/mistymntncop/C…
New blog post: A journey in Android physical memory - writeup on exploiting recent GPU bug CVE-2025-21479 dawnslab.jd.com/android_gpu_at…
Documented instructions for setting up KGDB on Pixel 8. Including getting kernel log over UART via USB-Cereal, building/flashing custom kernel, breaking into KGDB via /proc/sysrq-trigger or by sending SysRq-G over serial, dealing with watchdogs, etc. xairy.io/articles/pixel…
NEW syscall/mach_trap
No MTE added to iPhone17,1
Slides of my talk at #Zer0Con2025! ⚡️ Kernel-Hack-Drill: Environment For Developing Linux Kernel Exploits ⚡️ I presented the kernel-hack-drill open-source project and showed how it helped me to exploit CVE-2024-50264 in the Linux kernel. Enjoy! a13xp0p0v.github.io/img/Alexander_…
Speculative Execution to break ARM’s Memory Tagging Extension (MTE) arxiv.org/pdf/2406.08719 #Linux #cybersecurity
Breaking ARM’s Memory Tagging Extension with Speculative Execution (paper) arxiv.org/pdf/2406.08719 #cybsersecurity #Linux
TIKTAG: Breaking ARM’s Memory Tagging Extension with Speculative Execution arxiv.org/pdf/2406.08719 #Linux #cybersecurity
@wipawel's CVE system today produced a dump of ~50 "interesting" Linux kernel CVEs. Walk through CVE-2024-26972 (current link: nvd.nist.gov/vuln/detail/CV…, previous link: lore.kernel.org/linux-cve-anno…) and its automated updates and see if you as an end-user can make heads or tails of it.
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