drawnto 🟨⬜🟪⬛Jun 17, 2024
Robot girl which lets you wipe her cache so you can #rowhammer it
Robotbeing which lets you use memory mapped hardware registers controlling cpu power so you can #CLCKSCRW it
Robotbeing disabling page table isolation so you can #meltdown its permission management
Robotbeing which is suprised when you #foreshadow its private data
Robotbeing which has sensitive data #fallout
Robotbeing fucked so hard that it suffers #retbleed / #RAMbleed
Robotbeing #KRACK s on your hotspot
CNX SoftwareFeb 20, 2023

#Linux 6.2 is out with initial support for some @Apple #Arm processors. We go through some of the highlights and dive into more details for the Arm, #RISCV and #MIPS architectures. #security #exfat #retbleed #debugging #lowpower
https://www.cnx-software.com/2023/02/20/linux-6-2-release-main-changes-arm-risc-v-and-mips-architectures/

Original tweet : https://twitter.com/cnxsoft/status/1627612465436692486

Linux 6.2 release - Main changes, Arm, RISC-V, and MIPS architectures - CNX Software

Linux 6.2 has just been released with Linus Torvalds making the announcement on LKML as usual: So here we are, right on (the extended) schedule, with 6.2

CNX Software - Embedded Systems News
Thorsten Leemhuis (acct. 1/4)Dec 15, 2022

Some highlights from a x86 core updates merge for #Linux #kernel 6.2:
https://git.kernel.org/torvalds/c/94a855111ed9106971ca2617c5d075269e6aefde #LinuxKernel

```
- Add the call depth tracking mitigation for #Retbleed […] It is a lighterweight software-only fix for Skylake-based cores where enabling IBRS is a big hammer and causes a significant performance impact. [Benchmarks: https://lore.kernel.org/all/2022091511[email protected]/ ]

- Implement a new control flow integrity scheme called FineIBT which is based on the software kCFI implementation […]
```

kernel/git/torvalds/linux.git - Linux kernel source tree

PhoronixDec 14, 2022

Call Depth Tracking Coming To #Linux 6.2 To Help Recover Performance On #Intel #Skylake-Era CPUs

-- Much less costly than IBRS in light of #Retbleed. Benchmarks coming.

https://www.phoronix.com/news/Call-Depth-Tracking-Linux-6.2

Original tweet : https://twitter.com/phoronix/status/1602984970838052865

Call Depth Tracking Coming To Linux 6.2 To Help Recover Performance On Skylake-Era CPUs

PhoronixSep 17, 2022

Call Depth Tracking For Less Costly #Retbleed Mitigation Hopes To Land Soon

https://www.phoronix.com/news/Call-Depth-Tracking-Hope-Soon

Original tweet : https://twitter.com/phoronix/status/1571093772280397826

Call Depth Tracking For Less Costly Retbleed Mitigation Hopes To Land Soon

heise online (inoffiziell)Sep 12, 2022
Der Patch, der im Linux-Kernel 5.19 die Spectre-Variante Retbleed schließt, bringt große Leistungseinbußen bei VMs von VMware: Das zeigen Tests des Anbieters.
Bis zu 70 Prozent langsamer: Kernel-Fix gegen Retbleed macht Linux-VMs lahm
Bis zu 70 Prozent langsamer: Kernel-Fix gegen Retbleed macht Linux-VMs lahm

Der Patch, der im Linux-Kernel 5.19 die Spectre-Variante Retbleed schließt, bringt große Leistungseinbußen bei VMs von VMware: Das zeigen Tests des Anbieters.

heise online
PhoronixSep 9, 2022

#VMware: ESXi VM Performance Tanks Up To 70% Due To #Intel #Retbleed Mitigation

https://www.phoronix.com/news/VMware-Linux-5.19-ESXi-Retbleed

Original tweet : https://twitter.com/phoronix/status/1568257842842411010

VMware: ESXi VM Performance Tanks Up To 70% Due To Intel Retbleed Mitigation

heise online (inoffiziell)Aug 5, 2022
Der Open-Source-Kernel unterstützt nun die chinesischen CPU-Eigenentwicklung LoongArch und bohrt das Netzwerk für Bandbreiten jenseits von 100 GBit/s auf.
Linux 5.19: IP-Pakete in Jumbogröße und Unterstützung für LoongArch
Linux 5.19: IP-Pakete in Jumbogröße und Unterstützung für LoongArch

Der Open-Source-Kernel unterstützt nun die chinesischen CPU-Eigenentwicklung LoongArch und bohrt das Netzwerk für Bandbreiten jenseits von 100 GBit/s auf.

heise online
stdevelJul 29, 2022
Kurz vor der Urlaubszeit sprechen wir in der neuen FOL-#podcast Folge nochmal über viele 9er-Versionen, #RETBleed sowie den neuen SUSE Manager und Red Hat Satellite-Versionen - auch Proxmox kommt nicht zu kurz: https://focus.sva.de/focus-on-linux-newsupdate-07-22/ #vimbus2000
Focus On Linux: Newsupdate 07/22 - SVA

Focus On Linux - News im Juli: Die Sicherheitslücke RETBleed wirbelt die Community auf, Linux 9 Versionen gehen an den Start uvm.

SVA
CK's Technology NewsJul 24, 2022

#Linux #Retbleed overhyped - No fix in sight because attack scenario does not exists

Discussions
https://lore.kernel.org/lkml/CA+G9fYv0[email protected]/

https://lore.kernel.org/lkml/Ys%2FbWIk[email protected]/

RETBleed: WARNING: Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible! - Naresh Kamboju