{"cve":"CVE-2026-46268","nvd":{"published":"2026-06-03T18:16:28.473","modified":"2026-07-22T20:10:00.127","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c","https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5","https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-46268","score":0.00113,"percentile":0.01402,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}