fs/proc/task_mmu: do not warn on seeing non-migration pmd entry

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72173
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:35 UTC
Updated2026-08-17 06:18:17 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001890000 probability, percentile 0.088830000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a30b48bf1b244f11bf9b6d20cdccfe0c2264130c 319caaca072adc564ac9c5357ed013909f23d5ab git Not specified
CNA Linux Linux affected a30b48bf1b244f11bf9b6d20cdccfe0c2264130c cd1fc0e3c1f67c0c31dfc215e5d9b771133dedc0 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/319caaca072adc564ac9c5357ed013909f23d5ab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cd1fc0e3c1f67c0c31dfc215e5d9b771133dedc0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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