arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.
References
Link | Resource |
---|---|
http://packetstormsecurity.com/files/163324/KVM-nested_svm_vmrun-Double-Fetch.html | Third Party Advisory VDB Entry |
https://bugs.chromium.org/p/project-zero/issues/detail?id=2177 | Exploit Mailing List Patch Third Party Advisory |
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.12 | Exploit Patch Vendor Advisory |
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a58d9166a756a0f4a6618e4f593232593d6df134 | Patch Third Party Advisory |
https://security.netapp.com/advisory/ntap-20210902-0008/ | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
18 Oct 2021, 12:55
Type | Values Removed | Values Added |
---|---|---|
References | (CONFIRM) https://security.netapp.com/advisory/ntap-20210902-0008/ - Third Party Advisory |
02 Sep 2021, 09:15
Type | Values Removed | Values Added |
---|---|---|
References |
|
11 Aug 2021, 14:24
Type | Values Removed | Values Added |
---|---|---|
CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
CWE | CWE-416 CWE-367 |
|
CVSS |
v2 : v3 : |
v2 : 6.9
v3 : 7.4 |
References | (MISC) https://bugs.chromium.org/p/project-zero/issues/detail?id=2177 - Exploit, Mailing List, Patch, Third Party Advisory | |
References | (CONFIRM) https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.12 - Exploit, Patch, Vendor Advisory | |
References | (CONFIRM) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a58d9166a756a0f4a6618e4f593232593d6df134 - Patch, Third Party Advisory | |
References | (MISC) http://packetstormsecurity.com/files/163324/KVM-nested_svm_vmrun-Double-Fetch.html - Third Party Advisory, VDB Entry |
22 Jul 2021, 17:22
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2021-07-22 17:15
Updated : 2024-02-04 21:47
NVD link : CVE-2021-29657
Mitre link : CVE-2021-29657
CVE.ORG link : CVE-2021-29657
JSON object : View
Products Affected
linux
- linux_kernel