{"id":"CVE-2026-93288","published":"2026-09-24T17:17:10.070","lastModified":"2026-09-25T13:17:18.433","description":"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 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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/33d1469b0124cc0baaea7a2032123b77a81e0940","tags":[]},{"url":"https://git.kernel.org/stable/c/dc20050b6b12ca58066715d088e1a537535d938d","tags":[]},{"url":"https://git.kernel.org/stable/c/f4461654374576e9d5d0245fd534c46ad8509051","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}