Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2023-015 (ALASKERNEL-5.15-2023-015)

The version of kernel installed on the remote host is prior to 5.15.102-61.139. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2023-015 advisory. A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. ...

Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-132)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-132 advisory. 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...

OESA-2023-1143 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: The Linux kernel does not correctly mitigate SMT attacks, as discovered through a strange pattern in the kernel API using STIBP as a mitigation1 https://docs.kernel.org/userspace-api/specctrl.html, leaving the process exposed for...

CVE-2022-27672

A flaw was found in HW. 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. Mitigation The current mitigations for spectre V4 or spectrev2 should mitiga...

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

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

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

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 ...

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...

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...