{"id":"CVE-2026-72173","summary":"fs/proc/task_mmu: do not warn on seeing non-migration pmd entry","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc/task_mmu: do not warn on seeing non-migration pmd entry\n\nPatch series \"mm/hmm: A fix and a selftest\", v3.\n\nPatch 1 fixes a stale warning present from the time when only migration\nsoftleaf entries were supported at the PMD level.\n\nPatch 2 adds some code into hmm-tests.c which exercises the pagemap path\nfor PMD device-private entries.\n\n\nThis patch (of 2):\n\npagemap_pmd_range_thp() warns if a non-present PMD is not a migration\nentry.  This became false once device-private entries at the PMD level\nwere added.\n\nTherefore, remove the stale migration-only assertion.","modified":"2026-08-18T03:31:24.458271024Z","published":"2026-08-15T05:53:38.543Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72173.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/319caaca072adc564ac9c5357ed013909f23d5ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd1fc0e3c1f67c0c31dfc215e5d9b771133dedc0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72173.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72173"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a30b48bf1b244f11bf9b6d20cdccfe0c2264130c"},{"fixed":"319caaca072adc564ac9c5357ed013909f23d5ab"},{"fixed":"cd1fc0e3c1f67c0c31dfc215e5d9b771133dedc0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72173.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72173.json"}}],"schema_version":"1.9.0"}