{"id":"CVE-2026-93288","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state\n\nsashiko reports: \"nfnl_log_net_exit() calls nf_log_unset(), which\nclears the logger poi…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state\n\nsashiko reports: \"nfnl_log_net_exit() calls nf_log_unset(), which\nclears the logger poi…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f4461654374576e9d5d0245fd534c46ad8509051","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dc20050b6b12ca58066715d088e1a537535d938d","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 33d1469b0124cc0baaea7a2032123b77a81e0940","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-25","sourceUpdated":"2026-09-25T13:17:18.433","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93288","references":[{"url":"https://git.kernel.org/stable/c/33d1469b0124cc0baaea7a2032123b77a81e0940","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dc20050b6b12ca58066715d088e1a537535d938d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f4461654374576e9d5d0245fd534c46ad8509051","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T16:47:15.905Z","slug":"CVE-2026-93288","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state\n\nsashiko reports: \"nfnl_log_net_exit() calls nf_log_unset(), which\nclears the logger pointer without an RCU grace period.  Immediately after,\nops_free_list() frees the per-net state while concurrent packets might\nstill be executing nf_log_packet() under rcu_read_lock().\"\n\nClear the pointer via .pre_exit to make sure rcu readers have completed\nbefore pernet storage is free'd.  The change in nf_log_syslog.c is only\ndone for consistency: it doesn't use pernet data.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210537,"id":"CVE-2026-93288","ts":1790316054644,"field":"cvss","old":null,"new":"7.8"},{"seq":210536,"id":"CVE-2026-93288","ts":1790316054644,"field":"severity","old":"none","new":"high"}]}