{"id":"CVE-2026-68399","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in sock clone early bailouts\n\nSimilar to recent commit 9b51a6155d14 (\"bpf,fork: wipe ->bpf_storage\nbefore bailouts that access it\"), sk_clone() performs an…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in sock clone early bailouts\n\nSimilar to recent commit 9b51a6155d14 (\"bpf,fork: wipe ->bpf_storage\nbefore bailouts that access it\"), sk_clone() performs an…","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 >= 6ac99e8f23d4b10258406ca0dd7bffca5f31da9d < 01f8a354497ba739f81b691b3702bc4c46500a4d","Linux >= 6ac99e8f23d4b10258406ca0dd7bffca5f31da9d < 14b49b5ab29979552c219a09e569b424fbbf4a6e","Linux >= 6ac99e8f23d4b10258406ca0dd7bffca5f31da9d < 7cbd0c4cebe4c9f678d15e6b9ba975e1155a107f","Linux 5.2"],"published":"2026-08-10","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:41.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-68399","references":[{"url":"https://git.kernel.org/stable/c/01f8a354497ba739f81b691b3702bc4c46500a4d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/14b49b5ab29979552c219a09e569b424fbbf4a6e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7cbd0c4cebe4c9f678d15e6b9ba975e1155a107f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00129,"epssPercentile":0.02249,"ingestedAt":"2026-10-15T11:00:41.688Z","slug":"CVE-2026-68399","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in sock clone early bailouts\n\nSimilar to recent commit 9b51a6155d14 (\"bpf,fork: wipe ->bpf_storage\nbefore bailouts that access it\"), sk_clone() performs an initial\nshallow copy of the socket field ->sk_bpf_storage via sock_copy()\nfor the cloned socket newsk.\n\nIf sk_clone() bails out early (e.g. if sk_filter_charge() fails) prior\nto calling bpf_sk_storage_clone(), newsk->sk_bpf_storage still points\nto the parent socket's BPF local storage. When newsk is subsequently\nfreed via sk_free(), the deallocation path (__sk_destruct() ->\nbpf_sk_storage_free()) destroys the parent socket's BPF local storage,\nleading to a use-after-free (UAF) on the parent socket.\n\nFix this by resetting newsk->sk_bpf_storage to NULL immediately after\nsock_copy() in sk_clone(), and remove the now redundant initialization\nfrom bpf_sk_storage_clone().\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":[]}