CVE-2021-29657

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Summary

CVECVE-2021-29657
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-07-22 17:15:00 UTC
Updated2023-05-19 16:51:00 UTC
Descriptionarch/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.

Risk And Classification

Problem Types: CWE-416 | CWE-367

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

References

ReferenceSourceLinkTags
kernel/git/torvalds/linux.git - Linux kernel source tree CONFIRM git.kernel.org
2177 - project-zero - Project Zero - Monorail MISC bugs.chromium.org
KVM nested_svm_vmrun Double Fetch ≈ Packet Storm MISC packetstormsecurity.com
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.12 CONFIRM cdn.kernel.org
CVE-2021-29657 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security CONFIRM security.netapp.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 180529 Debian Security Update for linux (CVE-2021-29657)
  • 198365 Ubuntu Security Notification for Linux kernel (OEM) vulnerabilities (USN-4948-1)
  • 900292 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901480 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6554-1)
  • 902864 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5046)
  • 905925 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5046-1)
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