{"id":"CVE-2026-80685","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/util: don't read __page_2 for order-1 folios in snapshot_page()\n\nsnapshot_page() currently reads __page_2 after checking nr_pages > 1, but\nit should only do so when …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/util: don't read __page_2 for order-1 folios in snapshot_page()\n\nsnapshot_page() currently reads __page_2 after checking nr_pages > 1, but\nit should only do so when …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 31a31da8a6187f1e5448ec73222e01d7d3fed4aa < 9668ffe0e2a5e2399dce281620198a2e415871fc","Linux >= 31a31da8a6187f1e5448ec73222e01d7d3fed4aa < c649324571206a30949765320b91ccdb4c1722dc","Linux >= 31a31da8a6187f1e5448ec73222e01d7d3fed4aa < 7441d6348c70738e9ed307510db171c7a9b3f4bf","Linux 4117738bd42c8ab58090729daf0f8472a936f662","Linux >= 6.12.111 < 6.13","Linux 6.15"],"published":"2026-08-28","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:20.360","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80685","references":[{"url":"https://git.kernel.org/stable/c/7441d6348c70738e9ed307510db171c7a9b3f4bf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9668ffe0e2a5e2399dce281620198a2e415871fc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c649324571206a30949765320b91ccdb4c1722dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00124,"epssPercentile":0.02439,"ingestedAt":"2026-09-21T13:37:22.837Z","slug":"CVE-2026-80685","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmm/util: don't read __page_2 for order-1 folios in snapshot_page()\n\nsnapshot_page() currently reads __page_2 after checking nr_pages > 1, but\nit should only do so when nr_pages > 2.\n\nIf an order-1 folio is allocated at the end of a vmemmap section,\n__page_2 will not exist and reading it will cause a fault.\n\nDuring DLPAR memory remove on a 22 TB ppc64le LPAR, snapshot_page() oopsed\non the page isolation path while reading an order-1 folio's __page_2 from\nan adjacent absent section (unmapped vmemmap).\n\nFix this to avoid reading memmap that doesn't exist (e.g., a vmemmap\nhole).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}