CentOS Linux 7 [TuxCare] 安全更新：bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / 等多个漏洞 （CENTOS7：CLSA-2024：1725389829）
high Nessus 插件 ID 352756
语言：
简介
CentOS Linux 主机缺少一个或多个安全更新。描述
CentOS Linux 7 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS7：CLSA-2024：2024：1725389829公告中提及的多个漏洞的影响。- Linux 磁盘/网卡前端数据泄露 [其 CNA 信息记录与多个 CVE 有关；文本说明了哪些方面/漏洞与哪些 CVE 对应。] Linux Block 和 Network PV 设备前端未将内存区域归零便与后端共享此区域（CVE-2022-26365、CVE-2022-33740）。
此外，授权表的粒度不允许共享小于 4K 的页面，因为与后端共享的数据也可以被此后端访问，因而这可以导致不相关的数据驻留在同一 4K 页面中（CVE-2022-33741、CVE-2022-33742）。(CVE-2022-33742)
- 已修复 Linux 内核中的下列漏洞：net: fix out-of-bounds access in ops_init net_alloc_generic is called by net_alloc, which is called without any locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It is read twice, first to allocate an array, then to set s.len, which is later used to limit the bounds of the array access. It is possible that the array is allocated and another thread is registering a new pernet ops, increments max_gen_ptrs, which is then used to set s.len with a larger than allocated length for the variable array. Fix it by reading max_gen_ptrs only once in net_alloc_generic. If max_gen_ptrs is later incremented, it will be caught in net_assign_generic. (CVE-2024-36883)
- 已修复 Linux 内核中的下列漏洞：ALSA: Fix deadlocks with kctl removals at disconnection In snd_card_disconnect(), we set card->shutdown flag at the beginning, call callbacks and do sync for card->power_ref_sleep waiters at the end. The callback may delete a kctl element, and this can lead to a deadlock when the device was in the suspended state. Namely: * A process waits for the power up at snd_power_ref_and_wait() in snd_ctl_info() or read/write() inside card->controls_rwsem. * The system gets disconnected meanwhile, and the driver tries to delete a kctl via snd_ctl_remove*(); it tries to take card->controls_rwsem again, but this is already locked by the above. Since the sleeper isn't woken up, this deadlocks. An easy fix is to wake up sleepers before processing the driver disconnect callbacks but right after setting the card->shutdown flag. Then all sleepers will abort immediately, and the code flows again. So, basically this patch moves the wait_event() call at the right timing. While we're at it, just to be sure, call wait_event_all() instead of wait_event(), although we don't use exclusive events on this queue for now. (CVE-2024-38600)
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。
解决方案
根据 TuxCare 公告 CENTOS7：CLSA-2024：1725389829 中的指南更新受影响的程序包。另见
插件详情
严重性: High
ID: 352756
文件名: tuxcare_centos_7_CLSA-2024-1725389829.nasl
版本: 1.1
类型: Local
代理: unix
发布时间: 2026/9/30
最近更新时间: 2026/9/30
支持的传感器: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
风险信息
VPR
风险因素: Medium
分数: 6.3
百分位: 96.43
Vendor
Vendor Severity: Important
CVSS v2
风险因素: Low
基本分数: 3.6
时间分数: 2.7
矢量: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:P
CVSS 分数来源: CVE-2022-33742
CVSS v3
风险因素: High
基本分数: 7.1
时间分数: 6.2
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
时间矢量: CVSS:3.0/E:U/RL:O/RC:C
CVSS 分数来源: CVE-2024-36883
漏洞信息
必需的 KB 项: Host/OS/extended-third-party, Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
易利用性: No known exploits are available
补丁发布日期: 2024/9/3
漏洞发布日期: 2021/7/21
参考资料信息
CVE: CVE-2022-33742, CVE-2024-36883, CVE-2024-38600
CLSA: 2024:1725389829