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Memory isolation is a critical property for system reliability, security, and safety. We demonstrate RowPress, a DRAM read disturbance phenomenon different from the well-known RowHammer. RowPress induces bitflips by keeping a DRAM row open…

Memory isolation is critical for system reliability, security, and safety. Unfortunately, read disturbance can break memory isolation in modern DRAM chips. For example, RowHammer is a well-studied read-disturb phenomenon where repeatedly…

DRAM read disturbance can break memory isolation, a fundamental property to ensure system robustness (i.e., reliability, security, safety). RowHammer and RowPress are two different DRAM read disturbance phenomena. RowHammer induces bitflips…

Hardware Architecture · Computer Science 2024-06-25 Haocong Luo , Ismail Emir Yüksel , Ataberk Olgun , A. Giray Yağlıkçı , Mohammad Sadrosadati , Onur Mutlu

After a plethora of high-profile RowHammer attacks, CPU and DRAM vendors scrambled to deliver what was meant to be the definitive hardware solution against the RowHammer problem: Target Row Refresh (TRR). A common belief among practitioners…

Cryptography and Security · Computer Science 2020-04-07 Pietro Frigo , Emanuele Vannacci , Hasan Hassan , Victor van der Veen , Onur Mutlu , Cristiano Giuffrida , Herbert Bos , Kaveh Razavi

Aggressive memory density scaling causes modern DRAM devices to suffer from RowHammer, a phenomenon where rapidly activating a DRAM row can cause bit-flips in physically-nearby rows. Recent studies demonstrate that modern DRAM chips,…

RowHammer is a major read disturbance mechanism in DRAM where repeatedly accessing (hammering) a row of DRAM cells (DRAM row) induces bitflips in other physically nearby DRAM rows. RowHammer solutions perform preventive actions (e.g.,…

RowHammer attacks are a growing security and reliability concern for DRAMs and computer systems as they can induce many bit errors that overwhelm error detection and correction capabilities. System-level solutions are needed as process…

Hardware Architecture · Computer Science 2023-10-26 Steven C. Woo , Wendy Elsasser , Mike Hamburg , Eric Linstadt , Michael R. Miller , Taeksang Song , James Tringali

The RowHammer vulnerability in DRAM is a critical threat to system security. To protect against RowHammer, vendors commit to security-through-obscurity: modern DRAM chips rely on undocumented, proprietary, on-die mitigations, commonly known…

Cryptography and Security · Computer Science 2022-10-25 Hasan Hassan , Yahya Can Tugrul , Jeremie S. Kim , Victor van der Veen , Kaveh Razavi , Onur Mutlu

With lowering thresholds, transparently defending against Rowhammer within DRAM is challenging due to the lack of time to perform mitigation. Commercially deployed in-DRAM defenses like TRR that steal time from normal refreshes~(REF) to…

Cryptography and Security · Computer Science 2025-01-14 Hritvik Taneja , Moinuddin Qureshi

As process technology scales down to smaller dimensions, DRAM chips become more vulnerable to disturbance, a phenomenon in which different DRAM cells interfere with each other's operation. For the first time in academic literature, our ISCA…

Distributed, Parallel, and Cluster Computing · Computer Science 2016-03-03 Yoongu Kim , Ross Daly , Jeremie Kim , Chris Fallin , Ji Hye Lee , Donghyuk Lee , Chris Wilkerson , Konrad Lai , Onur Mutlu

This retrospective paper describes the RowHammer problem in Dynamic Random Access Memory (DRAM), which was initially introduced by Kim et al. at the ISCA 2014 conference~\cite{rowhammer-isca2014}. RowHammer is a prime (and perhaps the…

Cryptography and Security · Computer Science 2019-04-23 Onur Mutlu , Jeremie S. Kim

This paper investigates secure low-cost in-DRAM trackers for mitigating Rowhammer (RH). In-DRAM solutions have the advantage that they can solve the RH problem within the DRAM chip, without relying on other parts of the system. However,…

Cryptography and Security · Computer Science 2024-07-24 Moinuddin Qureshi , Salman Qazi , Aamer Jaleel

As Dynamic Random Access Memories (DRAM) scale, they are becoming increasingly susceptible to Row Hammer. By rapidly activating rows of DRAM cells (aggressor rows), attackers can exploit inter-cell interference through Row Hammer to flip…

Cryptography and Security · Computer Science 2024-03-19 Jeonghyun Woo , Gururaj Saileshwar , Prashant J. Nair

We provide an overview of recent developments and future directions in the RowHammer vulnerability that plagues modern DRAM (Dynamic Random Memory Access) chips, which are used in almost all computing systems as main memory. RowHammer is…

Cryptography and Security · Computer Science 2023-02-06 Onur Mutlu , Ataberk Olgun , A. Giray Yağlıkçı

Our ISCA 2014 paper provided the first scientific and detailed characterization, analysis, and real-system demonstration of what is now popularly known as the RowHammer phenomenon (or vulnerability) in modern commodity DRAM chips, which are…

Cryptography and Security · Computer Science 2023-06-29 Onur Mutlu

Recent advancements in side-channel attacks have revealed the vulnerability of modern Deep Neural Networks (DNNs) to malicious adversarial weight attacks. The well-studied RowHammer attack has effectively compromised DNN performance by…

Hardware Architecture · Computer Science 2024-12-04 Ranyang Zhou , Jacqueline T. Liu , Sabbir Ahmed , Shaahin Angizi , Adnan Siraj Rakin

Modern DRAM is vulnerable to read disturbance (e.g., RowHammer and RowPress) that significantly undermines the robust operation of the system. Repeatedly opening and closing a DRAM row (RowHammer) or keeping a DRAM row open for a long…

Hardware Architecture · Computer Science 2025-04-28 Haocong Luo , İsmail Emir Yüksel , Ataberk Olgun , A. Giray Yağlıkçı , Onur Mutlu

As memory scales down to smaller technology nodes, new failure mechanisms emerge that threaten its correct operation. If such failure mechanisms are not anticipated and corrected, they can not only degrade system reliability and…

Distributed, Parallel, and Cluster Computing · Computer Science 2017-03-03 Onur Mutlu

RowHammer is a major read disturbance mechanism in DRAM where repeatedly accessing (hammering) a row of DRAM cells (DRAM row) induces bitflips in physically nearby DRAM rows (victim rows). To ensure robust DRAM operation, state-of-the-art…

RowHammer stands out as a prominent example, potentially the pioneering one, showcasing how a failure mechanism at the circuit level can give rise to a significant and pervasive security vulnerability within systems. Prior research has…

Cryptography and Security · Computer Science 2024-04-30 Ranyang Zhou , Jacqueline T. Liu , Nakul Kochar , Sabbir Ahmed , Adnan Siraj Rakin , Shaahin Angizi
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