CVE-2023-1998

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2023-1998
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-04-21 15:15:00 UTC
Updated2023-05-03 15:16:00 UTC
DescriptionThe Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL 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 attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line. This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects.

Risk And Classification

Problem Types: CWE-203

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Linux Linux Kernel All All All All

References

ReferenceSourceLinkTags
Linux Kernel: Spectre v2 SMT mitigations problem · Advisory · google/security-research · GitHub MISC github.com
[SECURITY] [DLA 3403-1] linux security update MISC lists.debian.org Mailing List, Third Party Advisory
[SECURITY] [DLA 3404-1] linux-5.10 security update MISC lists.debian.org
x86/speculation: Allow enabling STIBP with legacy IBRS · torvalds/linux@6921ed9 · GitHub MISC github.com
???????? MISC kernel.dance
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 160837 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-4377)
  • 161147 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-7077)
  • 181765 Debian Security Update for linux-5.10 (DLA 3404-1)
  • 181768 Debian Security Update for linux (DLA 3403-1)
  • 184827 Debian Security Update for linux (CVE-2023-1998)
  • 199298 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6033-1)
  • 199424 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6172-1)
  • 199425 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6171-1)
  • 199438 Ubuntu Security Notification for Linux kernel (IBM) Vulnerabilities (USN-6187-1)
  • 199439 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6185-1)
  • 199451 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6207-1)
  • 199463 Ubuntu Security Notification for Linux kernel (Azure CVM) Vulnerabilities (USN-6223-1)
  • 199465 Ubuntu Security Notification for Linux kernel (Xilinx ZynqMP) Vulnerabilities (USN-6222-1)
  • 199614 Ubuntu Security Notification for Linux kernel (IoT) Vulnerabilities (USN-6256-1)
  • 241878 Red Hat Update for kernel security (RHSA-2023:4377)
  • 241886 Red Hat Update for kernel-rt (RHSA-2023:4378)
  • 242154 Red Hat Update for kernel (RHSA-2023:5604)
  • 242157 Red Hat Update for kernel-rt (RHSA-2023:5603)
  • 242434 Red Hat Update for kernel-rt security (RHSA-2023:6901)
  • 242451 Red Hat Update for kernel security (RHSA-2023:7077)
  • 242855 Red Hat Update for kernel (RHSA-2024:0412)
  • 355138 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355288 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355291 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355297 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355301 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355305 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355307 Amazon Linux Security Advisory for kernel : ALAS-2023-138
  • 355314 Amazon Linux Security Advisory for kernel : ALAS2023-2023-138
  • 673393 EulerOS Security Update for kernel (EulerOS-SA-2023-2647)
  • 674113 EulerOS Security Update for kernel (EulerOS-SA-2023-2689)
  • 753980 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2151-1)
  • 753981 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2146-1)
  • 753982 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2148-1)
  • 753985 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2162-1)
  • 754005 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2163-1)
  • 754023 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2232-1)
  • 755851 SUSE Enterprise Linux Security Update for the linux kernel (SUSE-SU-2023:2646-1)
  • 906894 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (26372-1)
  • 906902 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (26368-1)
  • 907090 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (26234-1)
  • 907149 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (26261-1)
  • 941213 AlmaLinux Security Update for kernel (ALSA-2023:4377)
  • 941214 AlmaLinux Security Update for kernel-rt (ALSA-2023:4378)
  • 941453 AlmaLinux Security Update for kernel (ALSA-2023:7077)
  • 960961 Rocky Linux Security Update for kernel-rt (RLSA-2023:4378)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

CVE.report and Source URL Uptime Status status.cve.report