Medium [CVE-2026-72239] Revert "Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN"
This medium-severity Red Hat Linux advisory covers CVE-2026-72239.
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Summary
A flaw was found in the Linux kernel, specifically within the Secure Encrypted Virtualization-Secure Nested Paging (SEV-SNP) feature. This vulnerability involves a timing issue, or race condition, during the process of clearing processor caches.
If not handled correctly, this can lead to a situation where critical memory regions, known as Real Mode Protection (RMP) tables, are not properly synchronized across processors. This failure to synchronize violates fundamental firmware requirements, which could compromise the integrity and security of virtualized environments.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-366.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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