{"id":"CVE-2025-68744","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to 'bpf_obj_free_fields()' in 'pcp…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to 'bpf_obj_free_fields()' in 'pcp…","severity":"none","published":"2025-12-24","updated":"2026-10-13","sourceUpdated":"2026-10-13T10:10:00.193","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68744","references":[{"url":"https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00187,"epssPercentile":0.07663,"ingestedAt":"2026-10-13T10:22:03.518Z","slug":"CVE-2025-68744","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\nmap gets freed.\n\nFix this by calling 'bpf_obj_free_fields()' after\n'copy_map_value[,_long]()' in 'pcpu_copy_value()'.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}