# CVE-2026-72239: linux: In the Linux kernel, the following vulnerability has been resolved:  x86/virt/sev: Revert "Drop WBINVD before setting...

CVE-2026-72239 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72239 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-72239
- Priority: Urgent
- CVSS: 9.3 (critical)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  x86/virt/sev: Revert "Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN"  Revert    99cf1fb58e68 ("x86/virt/sev: Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN").  Section 8.8 of the SNP spec says:    Before invoking SNP_INIT_EX with INIT_RMP set to 1, software must ensure   that no CPUs contain dirty cache lines for the memory containing the RMP.  Cachelines can be moved from cache to cache in a dirty state. The wbinvd_on_all_cpus() before SNP_INIT_EX flushes the caches for each CPU, but if the IPIs for WBINVD race with this dirty cacheline movement, it is possible that they may not get flushed, violating the firmware requirement.  Doing wbinvd_on_all_cpus() before setting SNPEn is safer since the RMP table is not yet in use.    [ Heroically bisected by Srikanth. ]   [ bp: Massage commit message. ]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72239](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72239.md) | Aug 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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