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{"bugzilla": {"description": "kernel: fs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan", "id": "2284470", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2284470"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan\nmake_uffd_wp_pte() was previously doing:\npte = ptep_get(ptep);\nptep_modify_prot_start(ptep);\npte = pte_mkuffd_wp(pte);\nptep_modify_prot_commit(ptep, pte);\nBut if another thread accessed or dirtied the pte between the first 2\ncalls, this could lead to loss of that information. Since\nptep_modify_prot_start() gets and clears atomically, the following is the\ncorrect pattern and prevents any possible race. Any access after the\nfirst call would see an invalid pte and cause a fault:\npte = ptep_modify_prot_start(ptep);\npte = pte_mkuffd_wp(pte);\nptep_modify_prot_commit(ptep, pte);"], "name": "CVE-2024-36943", "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": "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": "2024-05-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-36943\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36943\nhttps://lore.kernel.org/linux-cve-announce/2024053038-CVE-2024-36943-de68@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:31:27.894119+00:00", "updated": "2025-07-12T22:31:27.894177+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}