Security readout for executives and security teams
CVE-2021-37576 is a Linux kernel KVM issue on PowerPC systems. A user inside a guest operating system could trigger memory corruption in the host, crossing the guest-to-host isolation boundary. This matters mainly for organizations running PowerPC virtualization, especially where guests are less trusted. Exposure appears limited to Linux KVM on the PowerPC platform, not general Linux hosts. Highest concern is shared or multi-tenant virtualization where guest administrators or users are not fully trusted. Treat as high priority for affected PowerPC virtualization hosts because it threatens hypervisor isolation. For organizations without PowerPC KVM, business urgency is low after inventory confirms non-exposure. Mitigation focus: Apply vendor kernel updates that include the upstream fix.; Prioritize PowerPC KVM hosts running Linux through 5.13.5.; Review Debian, Fedora, NetApp, or relevant vendor advisories..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2021-37576 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#uCVE reference · x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10aCVE reference · x_refsource_MISC
- FEDORA-2021-817b3d47d2CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-12618d9b08CVE reference · vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20210917-0005/CVE reference · x_refsource_CONFIRM
- DSA-4978CVE reference · vendor-advisory, x_refsource_DEBIAN
Products and packages named in the record
CWE details
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