USN-6096-1: Linux kernel vulnerabilities

It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. CVE-2022-27672 Ziming Zhang discovered that the VMware Virtual GPU DR...

USN-6091-1: Linux kernel vulnerabilities

It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. CVE-2022-27672 Ziming Zhang discovered that the VMware Virtual GPU DR...

Ubuntu 22.04 LTS : Linux kernel (Raspberry Pi) vulnerabilities (USN-6085-1)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6085-1 advisory. It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread....

Ubuntu 22.04 LTS : Linux kernel vulnerabilities (USN-6079-1)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6079-1 advisory. It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread....

Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6080-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6080-1 advisory. It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a...

CVE-2023-1998 Spectre v2 SMT mitigations problem in Linux kernel

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

Linux Kernel 6.2 - Userspace Processes To Enable Mitigation

Exploit Title: Linux Kernel 6.2 - Userspace Processes To Enable Mitigation Exploit Author: nu11secur1ty CVE ID: CVE-2023-1998 Description Summary The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as...

Linux Kernel 6.2 - Userspace Processes To Enable Mitigation Exploit

Exploit Title: Linux Kernel 6.2 - Userspace Processes To Enable Mitigation Exploit Author: nu11secur1ty CVE ID: CVE-2023-1998 Description Summary The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as...

CVE-2023-1998

It was found that the Linux Kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The kernel failed to protect applications that attempted to protect against Spectre v2 leaving them open to attack from other processes...

Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2023-12255)

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12255 advisory. - Documentation/hw-vuln: Add documentation for Cross-Thread Return Predictions Tom Lendacky Orabug: 35166671 CVE-2022-27672 - KVM: x86: Mitigate t...

OESA-2023-1188 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: 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 A flaw was found in...

USN-5978-1 linux-oem-6.1 vulnerabilities

It was discovered that the Traffic-Control Index TCINDEX implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code. CVE-2023-1281 It was discovered that the KVM VMX...

Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5978-1)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5978-1 advisory. It was discovered that the Traffic-Control Index TCINDEX implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker...

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...