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. This flaw affects Linux kernel versions prior to 5.14-rc7.
References
Link | Resource |
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http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html | Exploit Third Party Advisory VDB Entry |
https://bugzilla.redhat.com/show_bug.cgi?id=1983686 | Issue Tracking Patch Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html | Mailing List Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html | Mailing List Third Party Advisory |
https://www.openwall.com/lists/oss-security/2021/08/16/1 | Mailing List Patch Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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History
16 May 2023, 10:49
Type | Values Removed | Values Added |
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CPE |
31 Mar 2022, 19:45
Type | Values Removed | Values Added |
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References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html - Mailing List, Third Party Advisory | |
References | (MISC) http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html - Exploit, Third Party Advisory, VDB Entry | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
06 Jan 2022, 20:15
Type | Values Removed | Values Added |
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References |
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17 Dec 2021, 01:15
Type | Values Removed | Values Added |
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References |
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16 Oct 2021, 01:15
Type | Values Removed | Values Added |
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References |
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08 Oct 2021, 16:13
Type | Values Removed | Values Added |
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CVSS |
v2 : v3 : |
v2 : 6.1
v3 : 8.8 |
References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1983686 - Issue Tracking, Patch, Third Party Advisory | |
References | (MISC) https://www.openwall.com/lists/oss-security/2021/08/16/1 - Mailing List, Patch, Third Party Advisory | |
CPE | cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
29 Sep 2021, 20:55
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2021-09-29 20:15
Updated : 2024-02-04 22:08
NVD link : CVE-2021-3653
Mitre link : CVE-2021-3653
CVE.ORG link : CVE-2021-3653
JSON object : View
Products Affected
redhat
- enterprise_linux
debian
- debian_linux
linux
- linux_kernel
CWE
CWE-862
Missing Authorization