Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - stagingrtl8712修正 rtl8712_dl_fw 中的釋放後使用 Syzbot 報告 rtl8712_dl_fw() 中存在釋放後使用。
    問題在於 r871xu_dev_remove() ->ndo_open() 回呼之間有爭用情形。從當機記錄不難看出驅動程式會存取 ->ndo_open() 回呼中已發布的韌體。這可能會發生因為驅動程式 _before_取消註冊 netdev 時會釋出韌體。透過在清理資源前移動 unregister_netdev() 來修正此問題。呼叫追踪... rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [內嵌] rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170 rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [內嵌] rtl871x_hal_init+0xae/0x180 drivers/staging/rtl8712/hal_init.c:394 netdev_open+0xe6/0x6c0 drivers/staging/rtl8712/os_intfs.c:380
    __dev_open+0x2bc/0x4d0 net/core/dev.c:1484 已由工作 1306 釋放... release_firmware+0x1b/0x30 drivers/base/firmware_loader/main.c:1053 r871xu_dev_remove+0xcc/0x2c0 drivers/staging/rtl8712/usb_intf .c:599 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 (CVE-2021-47479)

請注意，Nessus 依賴供應商報告的套件存在。

CentOS Linux 7 主機已安裝的套件會受到 TuxCare CENTOS7：CLSA-2026：1788170774 公告中提及的多個弱點影響。

  - 在 5.12-rc8 版之前的 Linux 核心 SCTP 通訊端 (net/sctp/socket.c) 中有一個爭用弱點，可導致核心權限從網路服務內容或無權限的處理程序提升。如果在沒有 sock_net(sk)->sctp.addr_wq_lock 的情況下呼叫 sctp_destroy_sock，則會在沒有任何適當鎖定的情況下，從 auto_asconf_splist 清單中移除元素。如果附加了拒絕建立某些 SCTP 通訊端的 BPF_CGROUP_INET_SOCK_CREATE，具有網路服務權限的攻擊者便可利用此弱點，升級至 root 權限或從無權限使用者的內容直接提升權限。(CVE-2021-23133)

  - 已解決 Linux 核心中的下列弱點：drm: Fix use-after-free read in drm_getunique() There is a time-of-check-to-time-of-use error in drm_getunique() due to retrieving file_priv->master prior to locking the device's master mutex. An example can be seen in the crash report of the use-after-free error found by Syzbot:
    https://syzkaller.appspot.com/bug?id=148d2f1dfac64af52ffd27b661981a540724f803 In the report, the master pointer was used after being freed. This is because another process had acquired the device's master mutex in drm_setmaster_ioctl(), then overwrote fpriv->master in drm_new_set_master(). The old value of fpriv->master was subsequently freed before the mutex was unlocked. To fix this, we lock the device's master mutex before retrieving the pointer from from fpriv->master. This patch passes the Syzbot reproducer test. (CVE-2021-47280)

  - 已解決 Linux 核心中的下列弱點：scsi: mpt3sas: Fix kernel panic during drive powercycle test While looping over shost's sdev list it is possible that one of the drives is getting removed and its sas_target object is freed but its sdev object remains intact. Consequently, a kernel panic can occur while the driver is trying to access the sas_address field of sas_target object without also checking the sas_target object for NULL. (CVE-2021-47565)

  - 已解決 Linux 核心中的下列弱點：dm btree remove: fix use after free in rebalance_children() Move dm_tm_unlock() after dm_tm_dec(). (CVE-2021-47600)

  - 已解決 Linux 核心中的下列弱點：media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init Syzbot reported that -1 is used as array index. The problem was in missing validation check. hdw->unit_number is initialized with -1 and then if init table walk fails this value remains unchanged. Since code blindly uses this member for array indexing adding sanity check is the easiest fix for that. hdw->workpoll initialization moved upper to prevent warning in __flush_work.
    (CVE-2022-49478)

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

ID	名稱	產品	系列	已發布	已更新	嚴重性
224306	Linux Distros 未修補的弱點：CVE-2021-47479	Nessus	Misc.	2025/3/5	2026/7/17	high
359803	CentOS Linux 7 [TuxCare] 安全性更新：bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / etc 多個弱點（CENTOS7：CLSA-2026：1788170774）	Nessus	CentOS Local Security Checks	2026/10/1	2026/10/1	high

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