{"api_version":"1","generated_at":"2026-06-06T01:32:44+00:00","cve":"CVE-2026-46268","urls":{"html":"https://cve.report/CVE-2026-46268","api":"https://cve.report/api/cve/CVE-2026-46268.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46268","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46268"},"summary":{"title":"PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition\n\nCommit b7e282378773 has already changed the initial page refcount of\np2pdma page from one to zero, however, in p2pmem_alloc_mmap() it uses\n\"VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\" to assert the initial page\nrefcount should not be zero and the following will be reported when\nCONFIG_DEBUG_VM is enabled:\n\n  page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x380400000\n  flags: 0x20000000002000(reserved|node=0|zone=4)\n  raw: 0020000000002000 ff1100015e3ab440 0000000000000000 0000000000000000\n  raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\n  page dumped because: VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\n  ------------[ cut here ]------------\n  WARNING: CPU: 5 PID: 449 at drivers/pci/p2pdma.c:240 p2pmem_alloc_mmap+0x83a/0xa60\n\nFix by using \"page_ref_count(page)\" as the assertion condition.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:28","updated_at":"2026-06-05 20:51:20"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c","name":"https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a","name":"https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5","name":"https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46268","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46268","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7e2823787735ca009e63f35f164b46df0ef096c eb9aa9f8010465d927864f5a35bdc5604b0ff51a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7e2823787735ca009e63f35f164b46df0ef096c 9b69243983fb2f4d4d1f4ef0989bc1296547dc2c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7e2823787735ca009e63f35f164b46df0ef096c cb500023a75246f60b79af9f7321d6e75330c5b5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46268","cve":"CVE-2026-46268","epss":"0.000170000","percentile":"0.042400000","score_date":"2026-06-05","updated_at":"2026-06-06 00:14:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/pci/p2pdma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"eb9aa9f8010465d927864f5a35bdc5604b0ff51a","status":"affected","version":"b7e2823787735ca009e63f35f164b46df0ef096c","versionType":"git"},{"lessThan":"9b69243983fb2f4d4d1f4ef0989bc1296547dc2c","status":"affected","version":"b7e2823787735ca009e63f35f164b46df0ef096c","versionType":"git"},{"lessThan":"cb500023a75246f60b79af9f7321d6e75330c5b5","status":"affected","version":"b7e2823787735ca009e63f35f164b46df0ef096c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/pci/p2pdma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition\n\nCommit b7e282378773 has already changed the initial page refcount of\np2pdma page from one to zero, however, in p2pmem_alloc_mmap() it uses\n\"VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\" to assert the initial page\nrefcount should not be zero and the following will be reported when\nCONFIG_DEBUG_VM is enabled:\n\n  page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x380400000\n  flags: 0x20000000002000(reserved|node=0|zone=4)\n  raw: 0020000000002000 ff1100015e3ab440 0000000000000000 0000000000000000\n  raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\n  page dumped because: VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\n  ------------[ cut here ]------------\n  WARNING: CPU: 5 PID: 449 at drivers/pci/p2pdma.c:240 p2pmem_alloc_mmap+0x83a/0xa60\n\nFix by using \"page_ref_count(page)\" as the assertion condition."}],"providerMetadata":{"dateUpdated":"2026-06-03T15:50:10.101Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a"},{"url":"https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c"},{"url":"https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5"}],"title":"PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46268","datePublished":"2026-06-03T15:50:10.101Z","dateReserved":"2026-05-13T15:03:33.109Z","dateUpdated":"2026-06-03T15:50:10.101Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:28","lastModifiedDate":"2026-06-05 20:51:20","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46268","Ordinal":"1","Title":"PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition","CVE":"CVE-2026-46268","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46268","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition\n\nCommit b7e282378773 has already changed the initial page refcount of\np2pdma page from one to zero, however, in p2pmem_alloc_mmap() it uses\n\"VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\" to assert the initial page\nrefcount should not be zero and the following will be reported when\nCONFIG_DEBUG_VM is enabled:\n\n  page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x380400000\n  flags: 0x20000000002000(reserved|node=0|zone=4)\n  raw: 0020000000002000 ff1100015e3ab440 0000000000000000 0000000000000000\n  raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\n  page dumped because: VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))\n  ------------[ cut here ]------------\n  WARNING: CPU: 5 PID: 449 at drivers/pci/p2pdma.c:240 p2pmem_alloc_mmap+0x83a/0xa60\n\nFix by using \"page_ref_count(page)\" as the assertion condition.","Type":"Description","Title":"PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition"}]}}}