Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - stagingrtl8712修复 rtl8712_dl_fw 中的释放后使用 Syzbot 报告的 rtl8712_dl_fw() 中的释放后使用。
    问题出在 r871xu_dev_remove() ->ndo_open() 回调之间的争用条件中。从崩溃日志不难发现该驱动程序访问 ->ndo_open() 回调中的已发布固件。可能发生因为驱动程序在 _before_ 取消注册 netdev 时发布固件。通过在清理资源之前移动 unregister_netdev() 可以修复此问题。调用跟踪... rtl871x_open_fw drivers/staging/rtl8712/hal_init.c:83 [内联] rtl8712_dl_fw+0xd95/0xe10 drivers/staging/rtl8712/hal_init.c:170 rtl8712_hal_init drivers/staging/rtl8712/hal_init.c:330 [ inline] 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 已由任务 1306 释放... 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)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

CentOS Linux 7 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS7：CLSA-2026：2026：1788170774 公告中提及的多个漏洞的影响。

  - 5.12-rc8 之前的 Linux 内核 SCTP 套接字 (net/sctp/socket.c) 中存在争用情形，可从网络服务上下文或无特权进程造成内核权限升级。如果在没有 sock_net(sk)->sctp.addr_wq_lock 的情况下调用 sctp_destroy_sock，则会从 auto_asconf_splist 列表中删除一个元素，而不会进行任何适当的锁定。如果附加的 BPF_CGROUP_INET_SOCK_CREATE 拒绝创建某些 SCTP 套接字，则具有网络服务权限的攻击者可利用此问题升级到根级权限或直接从非特权用户上下文升级权限。(CVE-2021-23133)

  - 已修复 Linux 内核中的下列漏洞：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)

  - 已修复 Linux 内核中的下列漏洞：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)

  - 已修复 Linux 内核中的下列漏洞：dm btree remove: fix use after free in rebalance_children() Move dm_tm_unlock() after dm_tm_dec(). (CVE-2021-47600)

  - 已修复 Linux 内核中的下列漏洞：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)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
224306	Linux Distros 未修补的漏洞：CVE-2021-47479	Nessus	Misc.	2025/3/5	2026/7/17	high
359803	CentOS Linux 7 [TuxCare] 安全更新：bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / 等多个漏洞（CENTOS7：CLSA-2026：1788170774）	Nessus	CentOS Local Security Checks	2026/10/1	2026/10/1	high

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