Bug 1888886 (CVE-2020-27152)
Summary: | CVE-2020-27152 Kernel: KVM: host stack overflow due to lazy update IOAPIC | ||
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Product: | [Other] Security Response | Reporter: | Prasad Pandit <ppandit> |
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, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, pbonzini, ptalbert, qzhao, rt-maint, rvrbovsk, steved, walters, williams |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Linux 5.10 | Doc Type: | If docs needed, set a value |
Doc Text: |
A stack overflow flaw via an infinite loop condition issue was found in the KVM hypervisor of the Linux kernel. This flaw occurs while processing interrupts because the IRQ state is erroneously set. This flaw allows a guest user to crash the host kernel, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2021-04-06 17:35:14 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: | 1867373, 1882793, 1888887, 1888888, 1906438, 1906439 | ||
Bug Blocks: | 1888749 |
Description
Prasad Pandit
2020-10-16 06:16:25 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1888887] Mitigation: Disabling APICV by setting the kvm_intel.enable_apicv=0 parameter helps to avoid this situation. Patch sent upstream. External References: https://bugzilla.kernel.org/show_bug.cgi?id=208767 https://www.openwall.com/lists/oss-security/2020/11/03/1 https://git.kernel.org/linus/77377064c3a94911339f13ce113b3abf265e06da Statement: This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2. This issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 8. Future kernel updates for Red Hat Enterprise Linux 8 may address this issue. This was fixed for Fedora with the 5.8.17 stable kernel update. This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1081 https://access.redhat.com/errata/RHSA-2021:1081 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1093 https://access.redhat.com/errata/RHSA-2021:1093 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-2020-27152 |