{"api_version":"1","generated_at":"2026-10-29T10:56:01+00:00","cve":"CVE-2025-40353","urls":{"html":"https://cve.report/CVE-2025-40353","api":"https://cve.report/api/cve/CVE-2025-40353.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40353","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40353"},"summary":{"title":"arm64: mte: Do not warn if the page is already tagged in copy_highpage()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Do not warn if the page is already tagged in copy_highpage()\n\nThe arm64 copy_highpage() assumes that the destination page is newly\nallocated and not MTE-tagged (PG_mte_tagged unset) and warns\naccordingly. However, following commit 060913999d7a (\"mm: migrate:\nsupport poisoned recover from migrate folio\"), folio_mc_copy() is called\nbefore __folio_migrate_mapping(). If the latter fails (-EAGAIN), the\ncopy will be done again to the same destination page. Since\ncopy_highpage() already set the PG_mte_tagged flag, this second copy\nwill warn.\n\nReplace the WARN_ON_ONCE(page already tagged) in the arm64\ncopy_highpage() with a comment.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-12-16 14:15:47","updated_at":"2026-10-14 13:10:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5ff5765a1fc526f07d3bbaedb061d970eb13bcf4","name":"https://git.kernel.org/stable/c/5ff5765a1fc526f07d3bbaedb061d970eb13bcf4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b98c94eed4a975e0c80b7e90a649a46967376f58","name":"https://git.kernel.org/stable/c/b98c94eed4a975e0c80b7e90a649a46967376f58","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0bbf3fc6e9211fce9889fe8efbb89c220504d617","name":"https://git.kernel.org/stable/c/0bbf3fc6e9211fce9889fe8efbb89c220504d617","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40353","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40353","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 060913999d7a9e50c283fdb15253fc27974ddadc 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 060913999d7a9e50c283fdb15253fc27974ddadc 0bbf3fc6e9211fce9889fe8efbb89c220504d617 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 060913999d7a9e50c283fdb15253fc27974ddadc b98c94eed4a975e0c80b7e90a649a46967376f58 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.56 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.6 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/mm/copypage.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5ff5765a1fc526f07d3bbaedb061d970eb13bcf4","status":"affected","version":"060913999d7a9e50c283fdb15253fc27974ddadc","versionType":"git"},{"lessThan":"0bbf3fc6e9211fce9889fe8efbb89c220504d617","status":"affected","version":"060913999d7a9e50c283fdb15253fc27974ddadc","versionType":"git"},{"lessThan":"b98c94eed4a975e0c80b7e90a649a46967376f58","status":"affected","version":"060913999d7a9e50c283fdb15253fc27974ddadc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/mm/copypage.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.56","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.56","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.6","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Do not warn if the page is already tagged in copy_highpage()\n\nThe arm64 copy_highpage() assumes that the destination page is newly\nallocated and not MTE-tagged (PG_mte_tagged unset) and warns\naccordingly. However, following commit 060913999d7a (\"mm: migrate:\nsupport poisoned recover from migrate folio\"), folio_mc_copy() is called\nbefore __folio_migrate_mapping(). If the latter fails (-EAGAIN), the\ncopy will be done again to the same destination page. Since\ncopy_highpage() already set the PG_mte_tagged flag, this second copy\nwill warn.\n\nReplace the WARN_ON_ONCE(page already tagged) in the arm64\ncopy_highpage() with a comment."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:47:43.712Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5ff5765a1fc526f07d3bbaedb061d970eb13bcf4"},{"url":"https://git.kernel.org/stable/c/0bbf3fc6e9211fce9889fe8efbb89c220504d617"},{"url":"https://git.kernel.org/stable/c/b98c94eed4a975e0c80b7e90a649a46967376f58"}],"title":"arm64: mte: Do not warn if the page is already tagged in copy_highpage()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40353","datePublished":"2025-12-16T13:30:26.273Z","dateReserved":"2025-04-16T07:20:57.187Z","dateUpdated":"2026-05-11T21:47:43.712Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-16 14:15:47","lastModifiedDate":"2026-10-14 13:10:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40353","Ordinal":"1","Title":"arm64: mte: Do not warn if the page is already tagged in copy_hi","CVE":"CVE-2025-40353","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40353","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Do not warn if the page is already tagged in copy_highpage()\n\nThe arm64 copy_highpage() assumes that the destination page is newly\nallocated and not MTE-tagged (PG_mte_tagged unset) and warns\naccordingly. However, following commit 060913999d7a (\"mm: migrate:\nsupport poisoned recover from migrate folio\"), folio_mc_copy() is called\nbefore __folio_migrate_mapping(). If the latter fails (-EAGAIN), the\ncopy will be done again to the same destination page. Since\ncopy_highpage() already set the PG_mte_tagged flag, this second copy\nwill warn.\n\nReplace the WARN_ON_ONCE(page already tagged) in the arm64\ncopy_highpage() with a comment.","Type":"Description","Title":"arm64: mte: Do not warn if the page is already tagged in copy_hi"}]}}}