{"id":"CVE-2026-90210","published":"2026-09-17T17:17:16.217","lastModified":"2026-09-18T18:17:46.723","description":"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, 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.","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/0253073fb7d79a2dd2eae9581ea16db2aef395a6","tags":[]},{"url":"https://git.kernel.org/stable/c/65c3939656fd7848e9274faa07c26748b5bf049c","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}