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SRAM Has No Chill: Exploiting Power Domain Separation to Steal On-Chip Secrets

news.ycombinator.com Jubayer Mahmod 2025-07-27 09:47:52

1 Introduction An increasingly connected world makes us dependent on computing devices that handle a wide range of security- and privacy-critical operations. We use smartphones and watches to manage bank transactions and store biometric information. On the industrial and government side, embedded devices monitor remote system operations and feed data critical to industrial processes and national defense. Physical access to these devices leads to a wide range of security exploits, including imper

Topics: boot data memory power sram

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Psilocybin treatment extends cellular lifespan, improves survival of aged mice

news.ycombinator.com Unknown 2025-07-30 01:29:58

As revenues from the anti-aging market — riddled with hope and thousands of supplements — surged past $500 million last year, Emory University researchers identified a compound that actively delays aging in cells and organisms. A newly published study in Nature Partner Journals’ Aging demonstrates that psilocin, a byproduct of consuming psilocybin, the active ingredient in psychedelic mushrooms, extended the cellular lifespan of human skin and lung cells by more than 50%. In parallel, research

Topics: aging emory life psilocybin study

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New Koske Linux malware hides in cute panda images

bleepingcomputer.com Unknown 2025-07-30 06:54:10

A new Linux malware named Koske may have been developed with artificial intelligence and is using seemingly benign JPEG images of panda bears to deploy malware directly into system memory. Researchers from cybersecurity company AquaSec analyzed Koske and described it as "a sophhisticated Linux threat." Based on the observed adaptive behavior, the researchers believe that the malware was developed using large language models (LLMs) or automation frameworks. Koske’s purpose is to deploy CPU and

Topics: aquasec koske malware memory shell

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There is no memory safety without thread safety

news.ycombinator.com Unknown 2025-07-31 02:35:39

There is no memory safety without thread safety Memory safety is all the rage these days. But what does the term even mean? That turns out to be harder to nail down than you may think. Typically, people use this term to refer to languages that make sure that there are no use-after-free or out-of-bounds memory accesses in the program. This is then often seen as distinct from other notions of safety such as thread safety, which refers to programs that do not have certain kinds of concurrency bugs

Topics: language memory program races safety

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Nvidia supplier SK Hynix posts record second-quarter profit and revenue on strong AI memory demand

cnbc.com Dylan Butts 2025-08-01 00:28:47

A visitor takes a picture of a model of SK hynix's high-bandwidth memory (HBM) technology during the 2025 World IT Show in Seoul on April 24, 2025. Jung Yeon-je | Afp | Getty Images South Korea's SK Hynix on Thursday posted record operating profit and revenue in the second quarter, driven by sustained demand for its high bandwidth memory used in artificial intelligence technology. Here are SK Hynix's second-quarter results compared with LSEG SmartEstimates, which are weighted toward forecasts f

Topics: demand hbm hynix memory sk

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Nvidia supplier SK Hynix second-quarter profit and revenue hit record highs, topping estimates

cnbc.com Dylan Butts 2025-08-01 02:42:19

The SK Hynix Inc. logo is displayed on a glass door at the company's office in Seoul, South Korea, on Monday, Jan. 27, 2014. SK Hynix aims to select a U.S. site for its advanced chip packaging plant and break ground there around the first quarter of next year. South Korea's SK Hynix on Thursday posted record operating profit and revenue in the second quarter on sustained demand for its high bandwidth memory technology used in generative AI chipsets. Here are SK Hynix's second-quarter results c

Topics: hynix memory quarter sk won

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Memory Efficiency in iOS: Reducing footprint and beyond

news.ycombinator.com Anton Gubarenko 2025-08-06 21:59:40

Previously, we explored how memory is measured and what tools are available for inspecting usage in iOS apps. Now, let’s shift our focus to reducing memory consumption using a set of practical techniques and development best practices. But first let’s discuss different approaches to treat this problem. Initial Source of a Problem Every spike in memory has a cause, and memory optimization is no exception. Sometimes it’s a 3rd-party library — Lottie is a classic example, especially if you export

Topics: app data memory objects use

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How we tracked down a Go 1.24 memory regression

news.ycombinator.com Nayef Ghattas 2025-08-05 14:02:41

When Go 1.24 was released in early 2025, we were eager to roll it out across our services. The headline feature—the new Swiss Tables map implementation—promised reduced CPU and memory overhead. Our story begins while the new version was being rolled out internally. Shortly after deploying it to one of our data-processing services, we noticed an unexpected memory usage increase: We observed the same pattern, a ~20% increase in memory usage, across multiple environments before pausing the rollou

Topics: 24 memory rss runtime usage

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How to write Rust in the Linux kernel: part 3

news.ycombinator.com Unknown 2025-08-07 17:27:17

How to write Rust in the kernel: part 3 [LWN subscriber-only content] Welcome to LWN.net The following subscription-only content has been made available to you by an LWN subscriber. Thousands of subscribers depend on LWN for the best news from the Linux and free software communities. If you enjoy this article, please consider subscribing to LWN. Thank you for visiting LWN.net! The interfaces between C and Rust in the kernel have grown over time; any non-trivial Rust driver will use a number of

Topics: data kernel lock memory rust

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Multiplatform Matrix Multiplication Kernels

news.ycombinator.com Unknown 2025-08-08 05:59:49

Few algorithmic problems are as central to modern computing as matrix multiplication. It is fundamental to AI, forming the basis of fully connected layers used throughout neural networks. In transformer architectures, most of the computation is spent performing matrix multiplication. And since compute largely determines capability, faster matrix multiplication algorithms directly translate into more powerful models [1 ]. NVIDIA probably deserves much of the credit for making matrix multiplicatio

Topics: buffering double global matmul memory

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Xbox Hacks: The A20 (2021)

news.ycombinator.com Unknown 2025-08-11 13:22:53

In November of this year (2021) we will hit 20 years since the release of the original Xbox. This console was full of vulnerabilities (or misconfiguration) from the software to the hardware and with such a low price point two decades ago for a computer - it was highly popular. For this post we are going to go into a lot of details regarding one mistake Microsoft made which was the A20. All the discoveries and research belongs to The Xbox Linux Project and Michael Steil. Research was obtained be

Topics: 20 address intel memory xbox

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Original Xbox Hacks: The A20 CPU Gate (2021)

news.ycombinator.com Unknown 2025-08-12 04:22:53

In November of this year (2021) we will hit 20 years since the release of the original Xbox. This console was full of vulnerabilities (or misconfiguration) from the software to the hardware and with such a low price point two decades ago for a computer - it was highly popular. For this post we are going to go into a lot of details regarding one mistake Microsoft made which was the A20. All the discoveries and research belongs to The Xbox Linux Project and Michael Steil. Research was obtained be

Topics: 20 address intel memory xbox

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A Rust shaped hole

news.ycombinator.com Unknown 2025-08-10 22:42:46

A Rust shaped hole By a process of elimination, I've arrived at a conclusion that I should write Rust, or at least give it a rigorous try. Let us say I want to write a "native" program. This train of thought started with wanting to write a program, an xfdesktop replacement, that can serve as my desktop background, slowly meandering though a pastel game of life, or floating through a Mandelbrot set. But the specifics are not relevant, because I find myself on the same train when thinking of ot

Topics: abstraction like memory native rust

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A Rust Shaped Hole

news.ycombinator.com Unknown 2025-08-11 23:42:46

A Rust shaped hole By a process of elimination, I've arrived at a conclusion that I should write Rust, or at least give it a rigorous try. Let us say I want to write a "native" program. This train of thought started with wanting to write a program, an xfdesktop replacement, that can serve as my desktop background, slowly meandering though a pastel game of life, or floating through a Mandelbrot set. But the specifics are not relevant, because I find myself on the same train when thinking of ot

Topics: abstraction like memory native rust

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Here’s what Mac you need for Cyberpunk 2077

theverge.com Tom Warren 2025-08-14 14:57:47

is a senior editor and author of Notepad , who has been covering all things Microsoft, PC, and tech for over 20 years. Cyberpunk 2077 is launching on macOS tomorrow, and CD Projekt Red is now sharing details on exactly what Mac you’ll need to get the most out of the game. While Cyberpunk 2077 has been optimized for a variety of Macs, from early M1 models up, if you want the top “very high fidelity” config then you’ll need an M3 Ultra or M4 Max machine with 36GB of unified memory. CD Projekt Re

Topics: 60fps m3 memory metalfx unified

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GPUHammer: Rowhammer attacks on GPU memories are practical

news.ycombinator.com Unknown 2025-08-14 14:05:45

GPUHammer: Rowhammer Attacks on GPU Memories are Practical # Chris (Shaopeng) Lin†, Joyce Qu†, Gururaj Saileshwar, from University of Toronto Published at USENIX Security 2025 (link to paper). Artifact available on GitHub and Zenodo. † equal contribution GPUHammer is the first attack to show Rowhammer bit flips on GPU memories, specifically on a GDDR6 memory in an NVIDIA A6000 GPU. Our attacks induce bit flips across all tested DRAM banks, despite in-DRAM defenses like TRR, using user-level C

Topics: bit dram flips gpu memory

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Human Stigmergy: The world is my task list

news.ycombinator.com Unknown 2025-08-15 05:27:19

Marco Giancotti , July 10, 2025 Cover image: Termite mound cross-section, Wikimedia Commons Termites and ants have no central planning. There are no architect ants in a nest-building project, no sponsors or supervisors, no instructions. Each worker is unaware and completely uninterested in what form the final mega-structure will take. No blueprints are to be found in any of their minds or outside them. Yet they build them all the time, and very well, too. Their substitute for plans and bluepri

Topics: memory need remember termite time

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Let's Learn x86-64 Assembly (2020)

news.ycombinator.com Unknown 2025-08-18 23:22:15

Let's Learn x86-64 Assembly! Part 0 - Setup and First Steps published on Apr 18 2020 The way I was taught x86 assembly at the university had been completely outdated for many years by the time I had my first class. It was around 2008 or 2009, and 64-bit processors had already started becoming a thing even in my neck of the woods. Meanwhile, we were doing DOS, real-mode, memory segmentation and all the other stuff from the bad old days. Nevertheless, I picked up enough of it during the classes

Topics: address entry memory program stack

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C3 solved memory lifetimes with scopes

news.ycombinator.com Unknown 2025-08-16 20:27:42

2025-07-11 Modern languages offer a variety of techniques to help with dynamic memory management, each one a different tradeoff in terms of performance, control and complexity. In this post we’ll look at an old idea, memory allocation regions or arenas, implemented via the C3 Temp allocator, which is the new default for C3. The Temp allocator combines the ease of use of garbage collection with C3’s unique features to give a simple and (semi)-automated solution within a manual memory management

Topics: allocator input int memory temp

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Let's Learn x86-64 Assembly Part 0 – Setup and First Steps

news.ycombinator.com Unknown 2025-08-19 04:22:15

Let's Learn x86-64 Assembly! Part 0 - Setup and First Steps published on Apr 18 2020 The way I was taught x86 assembly at the university had been completely outdated for many years by the time I had my first class. It was around 2008 or 2009, and 64-bit processors had already started becoming a thing even in my neck of the woods. Meanwhile, we were doing DOS, real-mode, memory segmentation and all the other stuff from the bad old days. Nevertheless, I picked up enough of it during the classes

Topics: address entry memory program stack

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These LGBTQ+ Archives Defy Erasure, One Memory at a Time

wired.com Geraldine Castro 2025-08-19 01:30:00

Being queer, often, means feeling unseen. “We come from a history of erasure that is manifested not only through hate crimes and discrimination, but also through a lack of representation, symbolic violence, and the absence of legal protections,” explains André Mere Rivera, director of the Queer Memory Archive of Peru (Archivo de la Memoria Marica del Perú). The project Mere leads is part of a growing wave of collaborative projects in which Latin American LGBTQ+ communities preserve and share th

Topics: archive argentina memory mere trans

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Making a Speedrun Timer in D

news.ycombinator.com Unknown 2025-08-14 23:14:02

How I made a speedrun timer in D I semi-recently played through the original Deus Ex, and enjoyed my time with it so much that I felt like getting into speedrunning it, which ended up with me having to create a custom speedrun timer that “injects” itself into the game in order to implement features such as auto-splitting and load time removal. This article details the rough journey I went through. It’s not super well structured, but I was sorely lacking resources such as this when I was implem

Topics: 00 bytes game map memory

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Fundamentals of garbage collection (2023)

news.ycombinator.com Unknown 2025-08-15 12:03:29

Access to this page requires authorization. You can try signing in or changing directories . Fundamentals of garbage collection In the common language runtime (CLR), the garbage collector (GC) serves as an automatic memory manager. The garbage collector manages the allocation and release of memory for an application. Therefore, developers working with managed code don't have to write code to perform memory management tasks. Automatic memory management can eliminate common problems such as forg

Topics: garbage generation heap memory objects

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Fundamentals of Garbage Collection

news.ycombinator.com Unknown 2025-08-15 17:03:29

Access to this page requires authorization. You can try signing in or changing directories . Fundamentals of garbage collection In the common language runtime (CLR), the garbage collector (GC) serves as an automatic memory manager. The garbage collector manages the allocation and release of memory for an application. Therefore, developers working with managed code don't have to write code to perform memory management tasks. Automatic memory management can eliminate common problems such as forg

Topics: garbage generation heap memory objects

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NVIDIA shares guidance to defend GDDR6 GPUs against Rowhammer attacks

bleepingcomputer.com Unknown 2025-08-20 10:39:05

NVIDIA is warning users to activate System Level Error-Correcting Code mitigation to protect against Rowhammer attacks on graphical processors with GDDR6 memory. The company is reinforcing the recommendation as new research demonstrates a Rowhammer attack against an NVIDIA A6000 GPU (graphical processing unit). Rowhammer is a hardware fault that can be triggered through software processes and stems from memory cells being too close to each other. The attack was demonstrated on DRAM cells but i

Topics: data ecc gpu memory nvidia

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Memory-Level Parallelism: Apple M2 vs. Apple M4

news.ycombinator.com View All Posts Daniel Lemire 2025-08-23 21:24:28

The Apple M2, introduced in 2022, and the Apple M4, launched in 2024, are both ARM-based system-on-chip (SoC) designs featuring unified memory architecture. That is, they use the same memory for both graphics (GPU) and main computations (CPU). The M2 processor relies on LPDDR5 memory whereas the M4 relies on LPDDR5X which should provide slightly more bandwidth. The exact bandwidth you get from an Apple system depends on your configuration. But I am interested in single-core random access perfor

Topics: apple channels forth memory processors

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Prime Day Is the Prime Time to Add a SanDisk Memory Card to Your Camera or Laptop for Peanuts

gizmodo.com Mike Fazioli 2025-08-24 21:50:02

It’s not here quite yet but the day may come when SanDisk enters that rarified category of brands that are synonymous with their entire product category, like Kleenex or Band-Aids or Popsicles. When you think of a SD card to add to your camera, laptop, or other device, you think of SanDisk, and Prime Day is a great time to think of adding a SanDisk or two to your tech collection now that the 256GB Extreme PRO SDXC UHS-II model is just $53. SanDisk did not come by its stellar reputation lightly.

Topics: extreme memory pro sandisk video

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6 Amazon Prime Day Mattress and Bedding Deals on Our Favorite Gear (2025)

wired.com Julia Forbes 2025-08-25 22:25:09

As you may have noticed, mattress shopping holidays aren't limited to just Memorial Day, Labor Day, or even the Fourth of July anymore. Now that Amazon Prime Day is nearly a week long, it's become something of a holiday in and of itself, so it makes sense that Amazon would start offering mattresses too. We've listed our favorite deals that someone on our staff has tested themselves and personally vouches for. If you want to know more about our favorite mattresses, we have you covered there too.

Topics: amazon day mattress memory wired

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Chinese researchers unveil MemOS, the first ‘memory operating system’ that gives AI human-like recall

venturebeat.com Michael Nuñez 2025-08-26 10:57:16

Want smarter insights in your inbox? Sign up for our weekly newsletters to get only what matters to enterprise AI, data, and security leaders. Subscribe Now A team of researchers from leading institutions including Shanghai Jiao Tong University and Zhejiang University has developed what they’re calling the first “memory operating system” for artificial intelligence, addressing a fundamental limitation that has hindered AI systems from achieving human-like persistent memory and learning. The sy

Topics: ai memory memos researchers systems

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Memstop: Use LD_PRELOAD to delay process execution when low on memory

news.ycombinator.com Unknown 2025-08-23 21:32:16

Memstop A lightweight LD_PRELOAD shared object that delays process execution when system memory is critically low. Memstop monitors available memory and waits until a configurable percentage of memory becomes available before allowing the application to start. Purpose Memstop is designed to prevent crashes caused by memory exhaustion in parallel processing systems. It can be particularly useful in: Parallel build systems (like make -j ) where you want to prevent the build from failing due to

Topics: available ld_preload make memory memstop

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Latest Tech News

SRAM Has No Chill: Exploiting Power Domain Separation to Steal On-Chip Secrets

Psilocybin treatment extends cellular lifespan, improves survival of aged mice

New Koske Linux malware hides in cute panda images

There is no memory safety without thread safety

Nvidia supplier SK Hynix posts record second-quarter profit and revenue on strong AI memory demand

Nvidia supplier SK Hynix second-quarter profit and revenue hit record highs, topping estimates

Memory Efficiency in iOS: Reducing footprint and beyond

How we tracked down a Go 1.24 memory regression

How to write Rust in the Linux kernel: part 3

Multiplatform Matrix Multiplication Kernels

Xbox Hacks: The A20 (2021)

Original Xbox Hacks: The A20 CPU Gate (2021)

A Rust shaped hole

A Rust Shaped Hole

Here’s what Mac you need for Cyberpunk 2077

GPUHammer: Rowhammer attacks on GPU memories are practical

Human Stigmergy: The world is my task list

Let's Learn x86-64 Assembly (2020)

C3 solved memory lifetimes with scopes

Let's Learn x86-64 Assembly Part 0 – Setup and First Steps

These LGBTQ+ Archives Defy Erasure, One Memory at a Time

Making a Speedrun Timer in D

Fundamentals of garbage collection (2023)

Fundamentals of Garbage Collection

NVIDIA shares guidance to defend GDDR6 GPUs against Rowhammer attacks

Memory-Level Parallelism: Apple M2 vs. Apple M4

Prime Day Is the Prime Time to Add a SanDisk Memory Card to Your Camera or Laptop for Peanuts

6 Amazon Prime Day Mattress and Bedding Deals on Our Favorite Gear (2025)

Chinese researchers unveil MemOS, the first ‘memory operating system’ that gives AI human-like recall

Memstop: Use LD_PRELOAD to delay process execution when low on memory

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