CentOS Linux 6 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS6：CLSA-2025：1762454401公告中提及的多个漏洞的影响。

  - Linux PV 设备前端容易受到后端攻击 [此 CNA 信息记录与多个 CVE 相关；文本说明了哪些方面/漏洞对应于哪些 CVE]。多个 Linux PV 设备前端正在以受争用条件约束的方式使用授予的桌面接口删除后端的访问权限，从而导致潜在的数据泄漏、恶意后端造成的数据损坏以及恶意后端触发的拒绝服务攻击：blkfront、netfront、scsifront 和 gntalloc 驱动程序正在测试授权引用是否仍在使用中。如果未正在使用，它们假设后续的授权访问删除将始终成功，但如果后端已在这两个操作之间映射授权页面，则情况并非如此。因此，无论前端 I/O 完成后如何使用页面，后端都可以始终访问客户机内存页面。
    xenbus 驱动程序存在类似的问题，因为它不检查是否成功删除了对共享环形缓冲区的访问权限。blkfront：CVE-2022-23036 netfront：CVE-2022-23037 scsifront：CVE-2022-23038 gntalloc：CVE-2022-23039 xenbus：CVE-2022-23040  blkfront、netfront、scsifront、usbfront、dmabuf、xenbus、9p、kbdfront 和 pvcalls 正在使用一种功能将释放授权引用延迟到不再使用，但相关数据页的释放未与放置授予访问权限同步。因此，即使在内存页面被释放并重新用于其他目的之后，后端仍可继续访问该页面。  如果 CVE-2022-23041 netfront 撤消 rx 路径中的访问权限失败，则 BUG_ON() 断言会失败。这将导致客户机发生可由后端触发的拒绝服务 (DoS) 情况。CVE-2022-23042 (CVE-2022-23037)

  - 已修复 Linux 内核中的下列漏洞：ALSA: oss: Fix PCM OSS buffer allocation overflow We've got syzbot reports hitting INT_MAX overflow at vmalloc() allocation that is called from snd_pcm_plug_alloc(). Although we apply the restrictions to input parameters, it's based only on the hw_params of the underlying PCM device. Since the PCM OSS layer allocates a temporary buffer for the data conversion, the size may become unexpectedly large when more channels or higher rates is given;
    in the reported case, it went over INT_MAX, hence it hits WARN_ON(). This patch is an attempt to avoid such an overflow and an allocation for too large buffers. First off, it adds the limit of 1MB as the upper bound for period bytes. This must be large enough for all use cases, and we really don't want to handle a larger temporary buffer than this size. The size check is performed at two places, where the original period bytes is calculated and where the plugin buffer size is calculated. In addition, the driver uses array_size() and array3_size() for multiplications to catch overflows for the converted period size and buffer bytes. (CVE-2022-49292)

  - 已修复 Linux 内核中的下列漏洞：net: atm: fix use after free in lec_send() The ->send() operation frees skb so save the length before calling ->send() to avoid a use after free. (CVE-2025-22004)

  - 已修复 Linux 内核中的下列漏洞：net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats. (CVE-2025-38477)

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。

检测

CentOS Linux 6 [TuxCare] 安全更新：kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多个漏洞（CENTOS6：CLSA-2025：1762454401）

high Nessus 插件 ID 361913

版本 1.1

检测

CentOS Linux 6 [TuxCare] 安全更新：kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多个漏洞 （CENTOS6：CLSA-2025：1762454401）

high Nessus 插件 ID 361913

版本 1.1

CentOS Linux 6 [TuxCare] 安全更新：kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc 多个漏洞（CENTOS6：CLSA-2025：1762454401）