kernel: KVM: SVM: nested shutdown interception could lead to host crash
Published Oct 24, 2022
6.5
MEDIUMCVSS 3.1
EPSS 0.23%
Description
A flaw was found in the KVM's AMD nested virtualization (SVM). A malicious L1 guest could purposely fail to intercept the shutdown of a cooperative nested guest (L2), possibly leading to a page fault and kernel panic in the host (L0).
Affected products
- Vendor n/a Product Linux kernel Defaultn/a
- Version Affected versions <= 6.0.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Linux kernel | n/a |
|
- ≤ 6.0.3
No data.
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Out of support scope
Red Hat Enterprise Linux 8
kernel
Fix deferred
Red Hat Enterprise Linux 8
kernel-rt
Fix deferred
Red Hat Enterprise Linux 9
kernel
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | n/a |
| Red Hat Enterprise Linux 8 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat currently provides the nested virtualization feature as a Technology Preview. Nested virtualization is therefore unsupported for production use. For more information please refer to https://access.redhat.com/solutions/21101 and https://access.redhat.com/support/offerings/techpreview.
Red Hat mitigation
This vulnerability can be mitigated by disabling the nested virtualization feature: ``` # modprobe -r kvm_amd # modprobe kvm_amd nested=0 ```
References (6)
- https://access.redhat.com/security/cve/CVE-2022-3344 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2130278 Issue TrackingPatchThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-42731 Advisory
- https://lore.kernel.org/lkml/20221020093055.224317-5-mlevitsk%40redhat.com/T/
- https://nvd.nist.gov/vuln/detail/CVE-2022-3344
- https://www.cve.org/CVERecord?id=CVE-2022-3344
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-3344 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2130278 | Issue TrackingPatchThird Party Advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-42731 | Advisory | |
| https://lore.kernel.org/lkml/20221020093055.224317-5-mlevitsk%40redhat.com/T/ | ||
| https://nvd.nist.gov/vuln/detail/CVE-2022-3344 | ||
| https://www.cve.org/CVERecord?id=CVE-2022-3344 |
Change history (0)
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