AlmaLinux 9.2 主机上存在安装的程序包，该程序包受到 TuxCare ALMALINUX9.2：CLSA-2026：1786350974公告中提及的多个漏洞的影响。

  - 已修复 Linux 内核中的下列漏洞：isofs: Fix out of bound access for corrupted isofs image When isofs image is suitably corrupted isofs_read_inode() can read data beyond the end of buffer. Sanity-check the directory entry length before using it. (CVE-2021-47478)

  - 已修复 Linux 内核中的下列漏洞：ubi: Fix race condition between ctrl_cdev_ioctl and ubi_cdev_ioctl Hulk Robot reported a KASAN report about use-after-free:
    ================================================================== BUG: KASAN: use-after-free in
    __list_del_entry_valid+0x13d/0x160 Read of size 8 at addr ffff888035e37d98 by task ubiattach/1385 [...] Call Trace: klist_dec_and_del+0xa7/0x4a0 klist_put+0xc7/0x1a0 device_del+0x4d4/0xed0 cdev_device_del+0x1a/0x80 ubi_attach_mtd_dev+0x2951/0x34b0 [ubi] ctrl_cdev_ioctl+0x286/0x2f0 [ubi] Allocated by task 1414: device_add+0x60a/0x18b0 cdev_device_add+0x103/0x170 ubi_create_volume+0x1118/0x1a10 [ubi] ubi_cdev_ioctl+0xb7f/0x1ba0 [ubi] Freed by task 1385:
    cdev_device_del+0x1a/0x80 ubi_remove_volume+0x438/0x6c0 [ubi] ubi_cdev_ioctl+0xbf4/0x1ba0 [ubi] [...] ================================================================== The lock held by ctrl_cdev_ioctl is ubi_devices_mutex, but the lock held by ubi_cdev_ioctl is ubi->device_mutex. Therefore, the two locks can be concurrent. ctrl_cdev_ioctl contains two operations: ubi_attach and ubi_detach. ubi_detach is bug-free because it uses reference counting to prevent concurrency. However, uif_init and uif_close in ubi_attach may race with ubi_cdev_ioctl. uif_init will race with ubi_cdev_ioctl as in the following stack. cpu1 cpu2 cpu3 _______________________|________________________|______________________ ctrl_cdev_ioctl ubi_attach_mtd_dev uif_init ubi_cdev_ioctl ubi_create_volume cdev_device_add ubi_add_volume // sysfs exist kill_volumes ubi_cdev_ioctl ubi_remove_volume cdev_device_del // first free ubi_free_volume cdev_del // double free cdev_device_del And uif_close will race with ubi_cdev_ioctl as in the following stack. cpu1 cpu2 cpu3 _______________________|________________________|______________________ ctrl_cdev_ioctl ubi_attach_mtd_dev uif_init ubi_cdev_ioctl ubi_create_volume cdev_device_add ubi_debugfs_init_dev //error goto out_uif; uif_close kill_volumes ubi_cdev_ioctl ubi_remove_volume cdev_device_del // first free ubi_free_volume // double free The cause of this problem is that commit 714fb87e8bc0 make device available before it becomes accessible via sysfs. Therefore, we roll back the modification. We will fix the race condition between ubi device creation and udev by removing ubi_get_device in vol_attribute_show and dev_attribute_show.This avoids accessing uninitialized ubi_devices[ubi_num]. ubi_get_device is used to prevent devices from being deleted during sysfs execution. However, now kernfs ensures that devices will not be deleted before all reference counting are released. The key process is shown in the following stack. device_del device_remove_attrs device_remove_groups sysfs_remove_groups sysfs_remove_group remove_files kernfs_remove_by_name kernfs_remove_by_name_ns __kernfs_remove kernfs_drain (CVE-2021-47634)

  - 已修复 Linux 内核中的下列漏洞：scsi: qla2xxx: Fix memory leak in
    __qlt_24xx_handle_abts() Commit 8f394da36a36 (scsi: qla2xxx: Drop TARGET_SCF_LOOKUP_LUN_FROM_TAG) made the __qlt_24xx_handle_abts() function return early if tcm_qla2xxx_find_cmd_by_tag() didn't find a command, but it missed to clean up the allocated memory for the management command. (CVE-2022-48650)

  - 已修复 Linux 内核中的下列漏洞：ubi: ubi_create_volume: Fix use-after-free when volume creation failed There is an use-after-free problem for 'eba_tbl' in ubi_create_volume()'s error handling path: ubi_eba_replace_table(vol, eba_tbl) vol->eba_tbl = tbl out_mapping:
    ubi_eba_destroy_table(eba_tbl) // Free 'eba_tbl' out_unlock: put_device(&vol->dev) vol_release kfree(tbl->entries) // UAF Fix it by removing redundant 'eba_tbl' releasing. Fetch a reproducer in [Link].
    (CVE-2022-49388)

  - 已修复 Linux 内核中的下列漏洞：irqchip/gic-v3: Fix error handling in gic_populate_ppi_partitions of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. When kcalloc fails, it missing of_node_put() and results in refcount leak. Fix this by goto out_put_node label. (CVE-2022-49716)

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。

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。

  - usbdwc2修复了驱动程序并发可能导致的空指针取消引用 在 _dwc2_hcd_urb_enqueue() 中执行 urb->hcpriv = NULL 时不会保持锁 hsotg->lock。在 _dwc2_hcd_urb_dequeue() 中
    spin_lock_irqsave(&hsotg->lock, flags); ... if (!urb->hcpriv) { dev_dbg(hsotg->dev, ## urb->hcpriv 为 NULL ##\n); goto out rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv); // 使用 urb->hcpriv ... 出
    spin_unlock_irqrestore(&hsotg->lock, flags);当并发执行 _dwc2_hcd_urb_enqueue() 和 _dwc2_hcd_urb_dequeue() 时可在 urb->hcpriv = NULL 之前执行 urb->hcpriv 的 NULL 检查。urb->hcpriv 为空之后可在对 dwc2_hcd_urb_dequeue() 的函数调用中使用可造成空指针取消引用。此可能的缺陷是通过我自己开发的实验性静态分析工具发现的。此工具分析锁定 API 以提取可并发执行的函数对，然后分析配对函数中的指令以确定可能的并发缺陷包括数据争用和原子性违规。当我的工具分析 Linux 的源代码时报告上述可能的缺陷 6.5。要修复这个可能的缺陷应该在保持锁 hsotg->lock 的情况下执行 urb->hcpriv = NULL。使用此修补程序之后我的工具绝不会通过针对 x86_64 的内核配置 allyesconfig 报告可能的缺陷。由于没有关联的硬件，因此无法在运行时测试中测试修补程序，而只是根据代码逻辑进行验证。 (CVE-2023-52855)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
360716	AlmaLinux 9.2 [TuxCare] 安全更新：bpftool / kernel / kernel-64k / kernel-64k-core / kernel-64k-debug 等多个漏洞（ALMALINUX9.2：CLSA-2026：1786350974）	Nessus	Alma Linux Local Security Checks	2026/10/1	2026/10/21	high
246454	Linux Distros 未修补的漏洞：CVE-2023-52855	Nessus	Misc.	2025/8/9	2026/11/11	medium

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