# CVE-2026-43096: linux: In the Linux kernel, the following vulnerability has been resolved:  mshv: Fix infinite fault loop on permission-deni...

CVE-2026-43096 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43096 (version 6.19.14-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-43096
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 6, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  mshv: Fix infinite fault loop on permission-denied GPA intercepts  Prevent infinite fault loops when guests access memory regions without proper permissions. Currently, mshv_handle_gpa_intercept() attempts to remap pages for all faults on movable memory regions, regardless of whether the access type is permitted. When a guest writes to a read-only region, the remap succeeds but the region remains read-only, causing immediate re-fault and spinning the vCPU indefinitely.  Validate intercept access type against region permissions before attempting remaps. Reject writes to non-writable regions and executes to non-executable regions early, returning false to let the VMM handle the intercept appropriately.  This also closes a potential DoS vector where malicious guests could intentionally trigger these fault loops to consume host resources.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.14-1 | [DEBIAN-CVE-2026-43096](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43096.md) | May 15, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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