遠端 Azure Linux 3.0 主機上安裝的核心版本比測試版舊。因此，此版本會受到 CVE-2025-21683 公告中提及的一個弱點影響。

  - 已解決 Linux 核心中的下列弱點：bpf: Fix bpf_sk_select_reuseport() memory leak As pointed out in the original comment, lookup in sockmap can return a TCP ESTABLISHED socket.
    Such TCP socket May have had SO_ATTACH_REUSEPORT_EBPF set before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_cb does not imply a non-refcounted socket. Drop sk's reference in both error paths.
    unreferenced object 0xffff888101911800 (size 2048): comm test_progs, pid 44109, jiffies 4297131437 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 9336483b): __kmalloc_noprof+0x3bf/0x560
    __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160
    __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e (CVE-2025-21683)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

偵測

Azure Linux 3.0 安全性更新核心 (CVE-2025-21683)

medium Nessus Plugin ID 235280

版本 1.2

版本 1.1

版本 1.2 Sep 17, 2025, 9:14 AM Detection (updated detection logic) Plugin Feed: 202509170914
版本 1.1 May 6, 2025, 12:13 PM New Plugin Feed: 202505061213