{"id":"CVE-2026-90210","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure\n\nWhen bpf_trampoline_update() fails before modify_fentry_multi()/\nunregister_fentry_multi() is called…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure\n\nWhen bpf_trampoline_update() fails before modify_fentry_multi()/\nunregister_fentry_multi() is called…","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 >= aef4dfa790b22d8052cfb78044eadbe03c876c39 < 65c3939656fd7848e9274faa07c26748b5bf049c","Linux >= aef4dfa790b22d8052cfb78044eadbe03c876c39 < 0253073fb7d79a2dd2eae9581ea16db2aef395a6","Linux 7.2"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:46.723","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90210","references":[{"url":"https://git.kernel.org/stable/c/0253073fb7d79a2dd2eae9581ea16db2aef395a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/65c3939656fd7848e9274faa07c26748b5bf049c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00154,"epssPercentile":0.04912,"ingestedAt":"2026-09-17T16:21:47.858Z","slug":"CVE-2026-90210","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix UAF in bpf_trampoline_multi_attach_free on update failure\n\nWhen bpf_trampoline_update() fails before modify_fentry_multi()/\nunregister_fentry_multi() is called, cur_image is unchanged\n(cur_image == old_image) and ftrace still calls into it.  Freeing\nold_image in that case causes a UAF.\n\nOnly free old_image when it differs from cur_image.\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":207181,"id":"CVE-2026-90210","ts":1789757339469,"field":"cvss","old":null,"new":"7.8"},{"seq":207180,"id":"CVE-2026-90210","ts":1789757339469,"field":"severity","old":"none","new":"high"}]}