CVE-2026-46268

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46268", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.109Z", "datePublished": "2026-06-03T15:50:10.101Z", "dateUpdated": "2026-06-03T15:50:10.101Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-03T15:50:10.101Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/p2pdma.c"], "versions": [{"version": "b7e2823787735ca009e63f35f164b46df0ef096c", "lessThan": "eb9aa9f8010465d927864f5a35bdc5604b0ff51a", "status": "affected", "versionType": "git"}, {"version": "b7e2823787735ca009e63f35f164b46df0ef096c", "lessThan": "9b69243983fb2f4d4d1f4ef0989bc1296547dc2c", "status": "affected", "versionType": "git"}, {"version": "b7e2823787735ca009e63f35f164b46df0ef096c", "lessThan": "cb500023a75246f60b79af9f7321d6e75330c5b5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/p2pdma.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4CC7C285-4CAC-4ED0-BEF1-D65CD5BA4AD1", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPCI/P2PDMA: Soluci\u00f3n a la condici\u00f3n de advertencia de p2pmem_alloc_mmap()\n\nEl commit b7e282378773 ya ha cambiado el recuento de referencias de p\u00e1gina inicial de la p\u00e1gina p2pdma de uno a cero; sin embargo, en p2pmem_alloc_mmap() utiliza 'VM_WARN_ON_ONCE_PAGE(!page_ref_count(page))' para afirmar que el recuento de referencias de p\u00e1gina inicial no debe ser cero y se informar\u00e1 lo siguiente cuando CONFIG_DEBUG_VM est\u00e9 habilitado:\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\nSe corrige utilizando 'page_ref_count(page)' como condici\u00f3n de aserci\u00f3n."}], "id": "CVE-2026-46268", "lastModified": "2026-07-22T20:10:00.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-03T18:16:28.473", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition", "id": "2484449", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484449"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's PCI/P2PDMA subsystem. Specifically, a warning condition in the `p2pmem_alloc_mmap()` function can be triggered due to an incorrect page reference count assertion. This issue occurs when the `CONFIG_DEBUG_VM` option is enabled, leading to kernel warning messages. While primarily a debugging concern, it may indicate unexpected system behavior or instability under specific configurations."], "name": "CVE-2026-46268", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46268\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46268\nhttps://lore.kernel.org/linux-cve-announce/2026060338-CVE-2026-46268-1753@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b7e2823787735ca009e63f35f164b46df0ef096c,eb9aa9f8010465d927864f5a35bdc5604b0ff51a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b7e2823787735ca009e63f35f164b46df0ef096c,9b69243983fb2f4d4d1f4ef0989bc1296547dc2c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b7e2823787735ca009e63f35f164b46df0ef096c,cb500023a75246f60b79af9f7321d6e75330c5b5)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-03T19:45:41.338419+00:00", "updated": "2026-06-09T23:45:15.690255+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}