# CVE-2026-98718: linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: SEV: Do cache maintenance on the source VM...

CVE-2026-98718 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98718 (version 7.2.10-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98718
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 18, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  KVM: SEV: Do cache maintenance on the source VM *before* clearing SEV state  Explicitly flush caches after intra-host migration before clearing "SEV active" on the source VM, as doing cache maintenance afterwards creates a tiny window where memory reclaim could return memory to the host without performing a cache flush, e.g. as pointed out by Sashiko:    CPU1 in sev_migrate_from():     src->active = false;    CPU2 running concurrent unmap:     Since active is false, the automatic cache flush in     sev_guest_memory_reclaimed is skipped.     The host frees and reallocates the page.    CPU1 in sev_migrate_from():     sev_writeback_caches(src_kvm);     Executes a hardware cache flush (wbnoinvd), which writes the guest's old     dirty ciphertext over the new page owner's data.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.10-1 | [DEBIAN-CVE-2026-98718](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98718.md) | Oct 19, 2026 |

---

Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.