CVE-2022-2196: Speculative execution attacks in KVM VMX
First published: Wed Sep 28 2022(Updated: )
A flaw was found in the KVM's Intel nested virtualization feature (nVMX). Since L1 and L2 shared branch prediction modes (guest-user and guest-kernel), KVM did not protect indirect branches in L1 from steering by a malicious agent in L2. This could allow a malicious nested guest to carry out Spectre v2 attacks against L1 due to a missing IBPB at VM-exit time.
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.4.47<5.4.233 | |
| Linux Linux kernel | >=5.6.19<5.7 | |
| Linux Linux kernel | >=5.7.3<5.10.170 | |
| Linux Linux kernel | >=5.11<5.15.96 | |
| Linux Linux kernel | >=5.16<6.1.14 | |
| Debian Debian Linux | =10.0 | |
| redhat/kernel-rt | <0:4.18.0-477.10.1.rt7.274.el8_8 | 0:4.18.0-477.10.1.rt7.274.el8_8 |
| redhat/kernel | <0:4.18.0-477.10.1.el8_8 | 0:4.18.0-477.10.1.el8_8 |
| redhat/kernel | <0:5.14.0-284.11.1.el9_2 | 0:5.14.0-284.11.1.el9_2 |
| redhat/kernel-rt | <0:5.14.0-284.11.1.rt14.296.el9_2 | 0:5.14.0-284.11.1.rt14.296.el9_2 |
| redhat/kernel | <6.2 | 6.2 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
This vulnerability can be mitigated by disabling the nested virtualization feature: ``` # modprobe -r kvm_intel # modprobe kvm_intel nested=0 ```
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Reference Links
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5
- https://kernel.dance/#2e7eab81425a
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://launchpad.net/bugs/cve/CVE-2022-2196
- https://www.cve.org/CVERecord?id=CVE-2022-2196 https://nvd.nist.gov/vuln/detail/CVE-2022-2196
- https://bugzilla.redhat.com/show_bug.cgi?id=2160023
- https://access.redhat.com/errata/RHSA-2023:2736
- https://access.redhat.com/errata/RHSA-2023:2951
- https://access.redhat.com/errata/RHSA-2023:2458
- https://access.redhat.com/errata/RHSA-2023:2148
- https://access.redhat.com/security/cve/cve-2022-2196
- https://lore.kernel.org/all/20221019213620.1953281-3-jmattson@google.com/
- https://github.com/torvalds/linux/commit/2e7eab81425ad6c875f2ed47c0ce01e78afc38a5
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2160031
- https://access.redhat.com/errata/RHSA-2024:0930
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2196
- https://nvd.nist.gov/vuln/detail/CVE-2022-2196
- https://security-tracker.debian.org/tracker/CVE-2022-2196
- https://ubuntu.com/security/CVE-2022-2196
- https://git.kernel.org/linus/2e7eab81425ad6c875f2ed47c0ce01e78afc38a5
- https://security.netapp.com/advisory/ntap-20230223-0002/
Parent vulnerabilities
(Appears in the following advisories)
- collector/launchpad-cve
- collector/nvd-api
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/weakness
- agent/author
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2022-2196
- agent/software-canonical-lookup
- agent/severity
- agent/title
- collector/mitre-cve
- source/MITRE
- agent/remedy
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.4.47
- version/linux linux kernel/5.6.19
- version/linux linux kernel/5.7.3
- version/linux linux kernel/5.11
- version/linux linux kernel/5.16
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- package-manager/redhat
- package-manager/debian