Information disclosure

When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch potentially resulting in information disclosure...

Information Disclosure

xen is vulnerable to Information Disclosure. AMD processors may speculatively execute instruction from a sibling thread after a SMT mode switch leading to information disclosure...

K49711130: OpenSSL and Intel processor SMT side-channel vulnerability (PortSmash) CVE-2018-5407

Security Advisory Description Simultaneous Multi-threading SMT in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention.' CVE-2018-5407 also known as PortSmash Impact The vulnerability allows an attacker who can...

kernel: an out-of-bounds vulnerability in i2c-ismt driver

An out-of-bounds memory access flaw was found in the Linux kernel Intel’s iSMT SMBus host controller driver in the way a user triggers the I2CSMBUSBLOCKDATA with the ioctl I2CSMBUS with malicious input data. This flaw allows a local user to crash the system...

CVE-2022-27672

When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch potentially resulting in information disclosure...

CVE-2022-27672

When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch potentially resulting in information disclosure...

CVE-2022-27672

CVE-2022-27672 describes a local information disclosure vulnerability on certain AMD CPUs where, when SMT is enabled, the processor may speculatively execute instructions using a target from the sibling thread after an SMT mode switch. The underlying issue is tied to speculative execution across ...

x86: Cross-Thread Return Address Predictions

ISSUE DESCRIPTION It has been discovered that on some AMD CPUs, the RAS Return Address Stack, also called RAP - Return Address Predictor - in some AMD documentation, and RSB - Return Stack Buffer - in Intel terminology is dynamically partitioned between non-idle threads. This allows an attacker t...

Cross-Thread Return Address Predictions

Bulletin ID: AMD-SB-1045 Potential Impact: Information Disclosure Summary AMD internally discovered a potential vulnerability where certain AMD processors may speculatively execute instructions at an incorrect return site after an SMT mode switch that may potentially lead to information disclosur...

Important: kernel

Issue Overview: Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an unwritten? assumption in the rest of the Linux network...

Security Bulletin: This Power System update is being released to address multiple CVEs for vTPM1.2

Summary This update addresses multiple CVEs that impacts any VM configured with a virtual trusted platform module vTPM version 1.2 Vulnerability Details CVEID:CVE-2018-5407 DESCRIPTION: Multiple SMT/Hyper-Threading architectures and processors could allow a local attacker to obtain sensitive...

CVE-2021-46778

Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2” and “Zen 3” that use simultaneous multithreading SMT. By measuring the contention level on scheduler queues an attacker may potentially leak sensitive...

CVE-2021-46778

CVE-2021-46778 describes an information-disclosure side-channel vulnerability in AMD CPUs with SMT (Zen 1–Zen 4). The root cause is execution unit scheduler contention on SMT-enabled cores, allowing an attacker to infer data by measuring scheduler-queue contention. Public documents identify affec...

CVE-2021-46778

A contention-based side channel vulnerability was found in hw. Some AMD CPUs using simultaneous multithreading SMT may allow an attacker to measure the contention level on scheduler queues, leading to potential leakage of sensitive information...

Execution Unit Scheduler Contention Side-Channel Vulnerability on AMD Processors

Bulletin ID: AMD-SB-1039 Potential Impact: Information Disclosure Severity: Medium Summary Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2”, “Zen 3” and “Zen 4” that use simultaneous multithreading SMT. By...

Retbleed - arbitrary speculative code execution with return instructions

ISSUE DESCRIPTION Researchers at ETH Zurich have discovered Retbleed, allowing for arbitrary speculative execution in a victim context. For more details, see: https://comsec.ethz.ch/retbleed ETH Zurich have allocated CVE-2022-29900 for AMD and CVE-2022-29901 for Intel. Despite the similar...

CVE-2022-33069

Ethereum Solidity v0.8.14 contains an assertion failure via SMTEncoder::indexOrMemberAssignment at SMTEncoder.cpp...

libvirt libvirt-python security update

libvirt 5.7.0-33.el7 - qemu: refresh vNUMA/SMT pinning. Wim ten Have Orabug: 34083505 - qemu driver: Check exadataConfig and packCPUs whenever vNUMA/SMT applies Wim ten Have Orabug: 34023508 - nwfilter: fix crash when counting number of network filters Daniel P. Berrange Orabug: 33973639...

NewStart CGSL CORE 5.04 / MAIN 5.04 : ovmf Multiple Vulnerabilities (NS-SA-2022-0009)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has ovmf packages installed that are affected by multiple vulnerabilities: - Buffer overflow in system firmware for EDK II may allow unauthenticated user to potentially enable escalation of privilege and/or denial of service vi...

CVE-2022-22805

A CWE-120: Buffer Copy without Checking Size of Input 'Classic Buffer Overflow' vulnerability exists that could cause remote code execution when an improperly handled TLS packet is reassembled. Affected Product: SmartConnect Family: SMT Series SMT Series ID=1015: UPS 04.5 and prior, SMC Series SM...