# CVE-2026-72173: linux: In the Linux kernel, the following vulnerability has been resolved:  fs/proc/task_mmu: do not warn on seeing non-migr...

CVE-2026-72173 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72173 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-72173
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- 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:  fs/proc/task_mmu: do not warn on seeing non-migration pmd entry  Patch series "mm/hmm: A fix and a selftest", v3.  Patch 1 fixes a stale warning present from the time when only migration softleaf entries were supported at the PMD level.  Patch 2 adds some code into hmm-tests.c which exercises the pagemap path for PMD device-private entries.   This patch (of 2):  pagemap_pmd_range_thp() warns if a non-present PMD is not a migration entry.  This became false once device-private entries at the PMD level were added.  Therefore, remove the stale migration-only assertion.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72173](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72173.md) | Aug 15, 2026 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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