![]() ![]() I just hope the cures for these vulnerabilities aren't worse than the problems themselves. It goes without saying that you should also be vigilant at all times and not click dodgy links or run non trusted apps. It will be well worth keeping an eye on your motherboard's product page, and you should update your BIOS when or if the vendor recommends you to do so. We'll have to wait until patches are rolled out for consumer motherboards before knowing what effects mitigations will have in the Windows ecosystem, but for now it seems as though compute intensive professional and enterprise level software is most affected.Īs I said last week when talking about Downfall, there's no need to panic. Phoronix ran the 3DMark Wildlife Extreme benchmark which showed an insignificant drop in performance. However, more consumer oriented apps like 7zip and Firefox fared better, though 7zip still lost upwards of 13%. ![]() In the worst case, MariaDB lost over 50% of performance. The results are very much workload dependent. Much like it did after the Downfall patches were released for Intel processors, Phoronix tested Linux kernel and microcode mitigations. On Linux machines, you can use msr-tools and execute the following command.Nvidia RTX 4070 and RTX 3080 Founders Edition graphics cardsīest CPU for gaming: The top chips from Intel and AMD.īest gaming motherboard: The right boards.īest graphics card: Your perfect pixel-pusher awaits.īest SSD for gaming: Get into the game ahead of the rest. ![]() Worryingly, AMD's official BIOS patches may not roll out for several months, in which case, there's a " chicken bit" that you can set if you're on a Linux or FreeBSD machine. It seems likely that Microsoft will incorporate something similar into Windows. Linux kernel 6.4.6 is already released and fixes this vulnerability by rolling in the official microcode patch from AMD. There's a reason why AMD has been very clear that Epyc Rome was patched before the vulnerability was made public: lots of sensitive information is being handled by Epyc CPUs, and it would be a disaster if any CPUs powering large-scale servers were successfully attacked. However, the stakes are much higher for datacenters and important people handling sensitive information on their own computers. A potential power side-channel vulnerability in AMD processors may allow an authenticated attacker to monitor the CPU power consumption as the data in a cache. This is a pretty sophisticated exploit and although it's public knowledge now, there are no known examples of an attacker using Zenbleed to hack into anything yet. This vulnerability therefore allows for a local privileged read, which means that an attacker must first achieve code execution on. The awesome UI, the intuitive UX, and the ease of implementation. For normal people who are just using gaming desktops and laptops, you probably don't need to be that worried. Learn about the impact in cloud environments of CVE-2023-20593, a cross-process information leak vulnerability in AMD Zen 2 Processors. This is a tricky thing to answer because not all computers are equal. What does this mean for computers that use vulnerable CPUs? When it does this, this is called a branch misprediction. According to AMD it is not practical but the. In August 2023 a vulnerability in AMDs Zen 1, Zen 2, Zen 3, and Zen 4 microarchitectures called INCEPTION was revealed and assigned CVE-2023-20569. ![]() AMD released a microcode update to fix it. If the work done is not needed, it's typically discarded and the processor can jump back to where it needs to in order to execute the next, correct, instruction. In July 2023 a critical vulnerability in the Zen 2 AMD microarchitecture called Zenbleed was made public. It's often done in times when your system has free resources, as it speeds up overall processing when instructions or data would otherwise not yet be ready for the CPU. Standard C library functions like strlen, which measures the length of a string, can use these registers for moving data around, and it's possible that, by chance, a password that you use could have unluckily fallen into one of these registers.īranch prediction and speculative execution broadly refer to when your computer performs operations that are not yet needed but will likely be needed in subsequent cycles. The vulnerability abuses speculative execution and branch mispredictions to essentially spit out a random piece of data from memory, but that data can be from anything. These registers are incredibly useful for lots of different things, including standard C functions. ![]()
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