CVE-2024-27022

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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. Those vmas\nshould be initialized first before they can be used."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The race is driven entirely through local syscalls \u2014 `memfd_create(MFD_HUGETLB)`/`ftruncate`/`mmap`, `fork()`, and `fallocate(FALLOC_FL_PUNCH_HOLE)` \u2014 on the attacker's own process. There is no network or remote-peer input path into `dup_mmap()` or `hugetlbfs_punch_hole()`.\nAC:L - The attacker controls both sides of the race, looping `fork()` in one thread while another loops hole-punch/truncate on the same hugetlbfs fd, and the vulnerable window spans `hugetlb_dup_vma_private()` through `copy_page_range()` to `vm_ops->open()`, which is widened to milliseconds simply by using a multi-GB mapping. No condition outside the attacker's influence is required.\nPR:L - Any unprivileged local user can reach this: `memfd_create(name, MFD_HUGETLB)` uses `HUGETLB_ANONHUGE_INODE`, which bypasses the `can_do_hugetlb_shm()`/`CAP_IPC_LOCK` check, and `MAP_NORESERVE` lets the mapping succeed even with no huge pages configured. No hugetlbfs mount, capability, or namespace privilege is needed.\nUI:N - The attacker's own process performs both the `fork()` and the `fallocate()`/`ftruncate()` that collide; no victim action, mount, or file open by another user is involved.\nS:U - The corruption is confined to kernel memory-management state (rwsem counters and hugetlb page tables) within the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Running `huge_pmd_unshare()` without the VMA lock reintroduces the shared-PMD page-table use-after-free that lock was added to prevent, letting a freed page-table page remain installed in another mm's PUD and be reallocated \u2014 yielding arbitrary physical memory read. Per kernel guidance, memory corruption of this class scores High.\nI:H - The same PMD page-table UAF gives an arbitrary-write primitive (attacker-controlled PTEs written into freed-and-reallocated memory map arbitrary physical frames), and the unbalanced `up_write()` underflows `sem->count`, destroying mutual exclusion on the lock that guards hugetlb page-table teardown.\nA:H - The mismatched lock/unlock leaves the parent's `hugetlb_vma_lock->rw_sema` permanently write-held, so every subsequent hugetlb fault, unmap, or `exit_mmap()` on that VMA blocks forever in D state \u2014 unkillable tasks and hung-task panic \u2014 in addition to the reported WARNING and UAF-induced oopses."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/fork.c"], "versions": [{"version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "087de0e15e6830ed630c793fa4bebd62e8348da1", "status": "affected", "versionType": "git"}, {"version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b", "status": "affected", "versionType": "git"}, {"version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "abdb88dd272bbeb93efe01d8e0b7b17e24af3a34", "status": "affected", "versionType": "git"}, {"version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "35e351780fa9d8240dd6f7e4f245f9ea37e96c19", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/fork.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.8", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "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": "6.1", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.8.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/087de0e15e6830ed630c793fa4bebd62e8348da1"}, {"url": "https://git.kernel.org/stable/c/2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b"}, {"url": "https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34"}, {"url": "https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19"}], "title": "fork: defer linking file vma until vma is fully initialized", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e", "tags": ["x_transferred"]}, {"url": 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"timestamp": "2024-09-10T15:44:40.515074Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:37.775Z"}}]}}

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There is no network or remote-peer input path into `dup_mmap()` or `hugetlbfs_punch_hole()`.\nAC:L - The attacker controls both sides of the race, looping `fork()` in one thread while another loops hole-punch/truncate on the same hugetlbfs fd, and the vulnerable window spans `hugetlb_dup_vma_private()` through `copy_page_range()` to `vm_ops->open()`, which is widened to milliseconds simply by using a multi-GB mapping. No condition outside the attacker's influence is required.\nPR:L - Any unprivileged local user can reach this: `memfd_create(name, MFD_HUGETLB)` uses `HUGETLB_ANONHUGE_INODE`, which bypasses the `can_do_hugetlb_shm()`/`CAP_IPC_LOCK` check, and `MAP_NORESERVE` lets the mapping succeed even with no huge pages configured. No hugetlbfs mount, capability, or namespace privilege is needed.\nUI:N - The attacker's own process performs both the `fork()` and the `fallocate()`/`ftruncate()` that collide; no victim action, mount, or file open by another user is involved.\nS:U - The corruption is confined to kernel memory-management state (rwsem counters and hugetlb page tables) within the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Running `huge_pmd_unshare()` without the VMA lock reintroduces the shared-PMD page-table use-after-free that lock was added to prevent, letting a freed page-table page remain installed in another mm's PUD and be reallocated \u2014 yielding arbitrary physical memory read. Per kernel guidance, memory corruption of this class scores High.\nI:H - The same PMD page-table UAF gives an arbitrary-write primitive (attacker-controlled PTEs written into freed-and-reallocated memory map arbitrary physical frames), and the unbalanced `up_write()` underflows `sem->count`, destroying mutual exclusion on the lock that guards hugetlb page-table teardown.\nA:H - The mismatched lock/unlock leaves the parent's `hugetlb_vma_lock->rw_sema` permanently write-held, so every subsequent hugetlb fault, unmap, or `exit_mmap()` on that VMA blocks forever in D state \u2014 unkillable tasks and hung-task panic \u2014 in addition to the reported WARNING and UAF-induced oopses."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "087de0e15e6830ed630c793fa4bebd62e8348da1", "versionType": "git"}, {"status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b", "versionType": "git"}, {"status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "abdb88dd272bbeb93efe01d8e0b7b17e24af3a34", "versionType": "git"}, {"status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "lessThan": "35e351780fa9d8240dd6f7e4f245f9ea37e96c19", "versionType": "git"}], "programFiles": ["kernel/fork.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"status": "unaffected", "version": "0", "lessThan": "6.1", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.134", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.8.8", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/fork.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/087de0e15e6830ed630c793fa4bebd62e8348da1"}, {"url": "https://git.kernel.org/stable/c/2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b"}, {"url": "https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34"}, {"url": "https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.134", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8.8", "versionStartIncluding": "6.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9", "versionStartIncluding": "6.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:18:08.505Z"}}}, "cveMetadata": {"cveId": "CVE-2024-27022", "state": "PUBLISHED", "dateUpdated": "2026-10-30T12:18:08.505Z", "dateReserved": "2024-02-19T14:20:24.210Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-01T05:35:39.627Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/fork.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "087de0e15e6830ed630c793fa4bebd62e8348da1", "status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "versionType": "git"}, {"lessThan": "2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b", "status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "versionType": "git"}, {"lessThan": "abdb88dd272bbeb93efe01d8e0b7b17e24af3a34", "status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "versionType": "git"}, {"lessThan": "35e351780fa9d8240dd6f7e4f245f9ea37e96c19", "status": "affected", "version": "8d9bfb2608145cf3e408428c224099e1585471af", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/fork.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"lessThan": "6.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.134", "versionType": "semver"}, {"lessThanOrEqual": "6.8.*", "status": "unaffected", "version": "6.8.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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": "2026-10-30T13:17:25.047", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-27022", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:44:40.515074Z", "version": "2.0.3"}}]}, "published": "2024-05-01T06:15:21.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/087de0e15e6830ed630c793fa4bebd62e8348da1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b"}, {"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"}

{}