Bug 1983686 (CVE-2021-3653)
Summary: | CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support) | ||
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Product: | [Other] Security Response | Reporter: | Mauro Matteo Cascella <mcascell> |
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
Status: | CLOSED ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, bhu, blc, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jeremy, jforbes, jlelli, jmaloy, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, mlevitsk, nmurray, pbonzini, ptalbert, qzhao, rhandlin, rvrbovsk, security-response-team, steved, walters, williams |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel 5.14-rc7 | Doc Type: | If docs needed, set a value |
Doc Text: |
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2021-09-15 12:21:09 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 1985403, 1985404, 1985405, 1985406, 1985407, 1985408, 1985409, 1985410, 1985411, 1985412, 1985413, 1985414, 1985415, 1985416, 1985417, 1985418, 1985419, 1985420, 1995451 | ||
Bug Blocks: | 1983680, 1983775 |
Description
Mauro Matteo Cascella
2021-07-19 13:54:37 UTC
This bug dates way back to kernel 2.6.30 where it was first introduced via commit: https://github.com/torvalds/linux/commit/3d6368ef580a Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1995451] This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:3547 https://access.redhat.com/errata/RHSA-2021:3547 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:3548 https://access.redhat.com/errata/RHSA-2021:3548 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-3653 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:3676 https://access.redhat.com/errata/RHSA-2021:3676 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.2 Advanced Update Support Via RHSA-2021:81932 https://access.redhat.com/errata/RHSA-2021:81932 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Advanced Update Support Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions Red Hat Enterprise Linux 7.6 Telco Extended Update Support Via RHSA-2021:3812 https://access.redhat.com/errata/RHSA-2021:3812 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:3801 https://access.redhat.com/errata/RHSA-2021:3801 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:3802 https://access.redhat.com/errata/RHSA-2021:3802 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:3909 https://access.redhat.com/errata/RHSA-2021:3909 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:3904 https://access.redhat.com/errata/RHSA-2021:3904 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Advanced Update Support Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions Red Hat Enterprise Linux 7.7 Telco Extended Update Support Via RHSA-2021:3987 https://access.redhat.com/errata/RHSA-2021:3987 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Advanced Update Support Via RHSA-2021:4692 https://access.redhat.com/errata/RHSA-2021:4692 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.3 Advanced Update Support Via RHSA-2021:4768 https://access.redhat.com/errata/RHSA-2021:4768 |