# CVE-2026-98653: linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: s390: Fix _gaccess_shadow_fault()  In some...

CVE-2026-98653 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98653 (version 7.2.9-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98653
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0016
- 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: s390: Fix _gaccess_shadow_fault()  In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the parent guest gmap. dat_entry_walk() will not find any leaf entry and return with -ENOENT, which will erroneously be propagated all the way to userspace.  Fix by manually calling gmap_link() on the memory of the nested guest that is being shadowed if the mapping was not already present.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.9-1 | [DEBIAN-CVE-2026-98653](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98653.md) | Oct 19, 2026 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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