{"cve":"CVE-2024-36943","nvd":{"published":"2024-05-30T16:15:17.307","modified":"2026-08-04T11:18:33.553","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan\n\nmake_uffd_wp_pte() was previously doing:\n\n  pte = ptep_get(ptep);\n  ptep_modify_prot_start(ptep);\n  pte = pte_mkuffd_wp(pte);\n  ptep_modify_prot_commit(ptep, pte);\n\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:\n\n  pte = ptep_modify_prot_start(ptep);\n  pte = pte_mkuffd_wp(pte);\n  ptep_modify_prot_commit(ptep, pte);","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","score":4.7},"cwes":[],"references":["https://git.kernel.org/stable/c/74b3d66f91d9f539f99faad74d796fa9a389a015","https://git.kernel.org/stable/c/c70dce4982ce1718bf978a35f8e26160b82081f4","https://git.kernel.org/stable/c/74b3d66f91d9f539f99faad74d796fa9a389a015","https://git.kernel.org/stable/c/c70dce4982ce1718bf978a35f8e26160b82081f4"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:51:20.603330631+00:00"},"epss":{"cve":"CVE-2024-36943","score":0.00182,"percentile":0.07824,"date":"2026-10-31"},"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."]}