The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - bpf: Fix memleak due to fentry attach failure If it fails to attach fentry, the allocated bpf trampoline     image will be left in the system. That can be verified by checking /proc/kallsyms. This meamleak can be     verified by a simple bpf program as follows: SEC(fentry/trap_init) int fentry_run() { return 0; } It     will fail to attach trap_init because this function is freed after kernel init, and then we can find the     trampoline image is left in the system by checking /proc/kallsyms. $ tail /proc/kallsyms ffffffffc0613000     t bpf_trampoline_6442453466_1 [bpf] ffffffffc06c3000 t bpf_trampoline_6442453466_1 [bpf] $ bpftool btf     dump file /sys/kernel/btf/vmlinux | grep FUNC 'trap_init' [2522] FUNC 'trap_init' type_id=119     linkage=static $ echo $((6442453466 & 0x7fffffff)) 2522 Note that there are two left bpf trampoline     images, that is because the libbpf will fallback to raw tracepoint if -EINVAL is returned.
    (CVE-2023-53221)

Note that Nessus relies on the presence of the package as reported by the vendor.

Detections

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Linux Distros Unpatched Vulnerability : CVE-2023-53221

medium Nessus Plugin ID 265050

Version 1.8

Version 1.7

Version 1.3

Version 1.2

Version 1.8 Oct 29, 2025, 3:03 AM Detection (updated detection logic) Plugin Feed: 202510290303
Version 1.7 Oct 28, 2025, 9:02 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:U/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:U/RC:C") Detection (updated detection logic) Plugin Feed: 202510280902
Version 1.3 Sep 20, 2025, 5:27 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202509200527
Version 1.2 Sep 17, 2025, 9:14 AM CVSS metrics ("CVSSv2 score" set to 4.9. "CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H". "CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C". "CVSSv3 score" set to 5.5) CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) New Plugin metadata Plugin Feed: 202509170914