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And the root cause is below race:\n\n CPU 1\t\t\t\t\tCPU 2\n fork\t\t\t\t\thugetlbfs_fallocate\n dup_mmap\t\t\t\t hugetlbfs_punch_hole\n i_mmap_lock_write(mapping);\n vma_interval_tree_insert_after -- Child vma is visible through i_mmap tree.\n i_mmap_unlock_write(mapping);\n hugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem!\n\t\t\t\t\t i_mmap_lock_write(mapping);\n \t\t\t\t\t hugetlb_vmdelete_list\n\t\t\t\t\t vma_interval_tree_foreach\n\t\t\t\t\t hugetlb_vma_trylock_write -- Vma_lock is cleared.\n tmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem!\n\t\t\t\t\t hugetlb_vma_unlock_write -- Vma_lock is assigned!!!\n\t\t\t\t\t i_mmap_unlock_write(mapping);\n\nhugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside\ni_mmap_rwsem lock while vma lock can be used in the same time. Fix this\nby deferring linking file vma until vma is fully initialized. 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A3D09CE2-613D-4A40-BA4F-D0E43023E4C1", "versionEndExcluding": "6.1.90", "versionStartIncluding": "6.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "84046DAF-73CF-429D-9BA4-05B658B377B5", "versionEndExcluding": "6.6.30", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "673B3328-389D-41A4-9617-669298635262", "versionEndExcluding": "6.8.8", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*", "matchCriteriaId": "DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*", "matchCriteriaId": "52048DDA-FC5A-4363-95A0-A6357B4D7F8C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*", "matchCriteriaId": "A06B2CCF-3F43-4FA9-8773-C83C3F5764B2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfork: defer linking file vma until vma is fully initialized\n\nThorvald reported a WARNING [1]. And the root cause is below race:\n\n CPU 1\t\t\t\t\tCPU 2\n fork\t\t\t\t\thugetlbfs_fallocate\n dup_mmap\t\t\t\t hugetlbfs_punch_hole\n i_mmap_lock_write(mapping);\n vma_interval_tree_insert_after -- Child vma is visible through i_mmap tree.\n i_mmap_unlock_write(mapping);\n hugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem!\n\t\t\t\t\t i_mmap_lock_write(mapping);\n \t\t\t\t\t hugetlb_vmdelete_list\n\t\t\t\t\t vma_interval_tree_foreach\n\t\t\t\t\t hugetlb_vma_trylock_write -- Vma_lock is cleared.\n tmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem!\n\t\t\t\t\t hugetlb_vma_unlock_write -- Vma_lock is assigned!!!\n\t\t\t\t\t i_mmap_unlock_write(mapping);\n\nhugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside\ni_mmap_rwsem lock while vma lock can be used in the same time. Fix this\nby deferring linking file vma until vma is fully initialized. Those vmas\nshould be initialized first before they can be used."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: fork: posponga la vinculaci\u00f3n del archivo vma hasta que vma est\u00e9 completamente inicializado. Thorvald inform\u00f3 una ADVERTENCIA [1]. Y la causa ra\u00edz est\u00e1 por debajo de la raza: CPU 1 CPU 2 fork hugetlbfs_fallocate dup_mmap hugetlbfs_punch_hole i_mmap_lock_write(mapping); vma_interval_tree_insert_after: el vma secundario es visible a trav\u00e9s del \u00e1rbol i_mmap. i_mmap_unlock_write(mapeo); enormetlb_dup_vma_private: \u00a1borre vma_lock fuera de i_mmap_rwsem! i_mmap_lock_write(mapeo); Hugetlb_vmdelete_list vma_interval_tree_foreach Hugetlb_vma_trylock_write: Vma_lock est\u00e1 borrado. tmp->vm_ops->open - \u00a1Asigne nuevo vma_lock fuera de i_mmap_rwsem! enormetlb_vma_unlock_write - \u00a1\u00a1\u00a1Vma_lock est\u00e1 asignado!!! i_mmap_unlock_write(mapeo); Hugetlb_dup_vma_private() y hugetlb_vm_op_open() se llaman fuera del bloqueo i_mmap_rwsem, mientras que el bloqueo vma se puede utilizar al mismo tiempo. Solucione este problema posponiendo la vinculaci\u00f3n del archivo vma hasta que vma est\u00e9 completamente inicializado. Esos vmas deben inicializarse primero antes de poder usarlos."}], "id": "CVE-2024-27022", "lastModified": "2025-11-04T18:16:12.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-01T06:15:21.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:6997", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.37.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6997", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.37.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-09-24T00:00:00Z"}], "bugzilla": {"description": "kernel: fork: defer linking file vma until vma is fully initialized", "id": "2278252", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278252"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfork: defer linking file vma until vma is fully initialized\nThorvald reported a WARNING [1]. And the root cause is below race:\nCPU 1CPU 2\nforkhugetlbfs_fallocate\ndup_mmap hugetlbfs_punch_hole\ni_mmap_lock_write(mapping);\nvma_interval_tree_insert_after -- Child vma is visible through i_mmap tree.\ni_mmap_unlock_write(mapping);\nhugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem!\ni_mmap_lock_write(mapping);\nhugetlb_vmdelete_list\nvma_interval_tree_foreach\nhugetlb_vma_trylock_write -- Vma_lock is cleared.\ntmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem!\nhugetlb_vma_unlock_write -- Vma_lock is assigned!!!\ni_mmap_unlock_write(mapping);\nhugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside\ni_mmap_rwsem lock while vma lock can be used in the same time. Fix this\nby deferring linking file vma until vma is fully initialized. Those vmas\nshould be initialized first before they can be used.", "A flaw was found in the Linux kernel. A race condition can occur when the fork system call is called due to improper locking, triggering a warning, impacting system stability, and resulting in a denial of service."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-27022", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-27022\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-27022\nhttps://lore.kernel.org/linux-cve-announce/2024050143-CVE-2024-27022-4325@gregkh/T"], "statement": "This issue can result in a denial of service with no other security impact. Additionally, this issue requires a race condition, which increases the complexity of exploitation. For these reasons, this vulnerability has been rated with a moderate severity.\nThe Linux kernel as shipped in Red Hat Enterprise Linux 8 is not affected by this vulnerability because the vulnerable code was introduced in a newer version of the Linux kernel.", "threat_severity": "Moderate"}

{}