Amazon Linux 2023：libvirt、libvirt-client、libvirt-client-qemu （ALAS2023-2026-2139）
high Nessus 插件 ID 345790
语言：
简介
远程 Amazon Linux 2023 主机缺少安全更新。描述
因此，它受到 ALAS2023-2026-2139 公告中提及的一个漏洞影响。在 libvirt 中发现一个缺陷。非特权本地用户可利用 NodeGetFreePages RPC 处理程序中的整数溢出漏洞。此缺陷允许构建的值绕过大小检查，从而导致内存缓冲区过小。因此，真正的 NUMA 节点数据可覆盖此缓冲区。此堆缓冲区溢出可损坏根 libvirt 后台程序的内存，从而可能导致拒绝服务或本地权限升级。（CVE-2026-18917）
Tenable 已直接从测试产品的安全公告中提取上述描述块。
请注意，Nessus 尚未测试此问题，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
运行“dnf update libvirt --releasever 2023.12.20260914”或“/或”dnf update --advisory ALAS2023-2026-2139 --releasever 2023.12.20260914“以更新系统。另见
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-2139.html
插件详情
严重性: High
ID: 345790
文件名: al2023_ALAS2023-2026-2139.nasl
版本: 1.1
类型: Local
代理: unix
发布时间: 2026/9/14
最近更新时间: 2026/9/14
支持的传感器: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
风险信息
VPR
风险因素: Medium
分数: 4.9
百分位: 58.19
CVSS v2
风险因素: Medium
基本分数: 6.8
时间分数: 5
矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 分数来源: CVE-2026-18917
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 6.8
矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
时间矢量: CVSS:3.0/E:U/RL:O/RC:C
漏洞信息
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:libvirt-client-debuginfo, p-cpe:/a:amazon:linux:libvirt-client-qemu, p-cpe:/a:amazon:linux:libvirt-client, p-cpe:/a:amazon:linux:libvirt-daemon-common-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-common, p-cpe:/a:amazon:linux:libvirt-daemon-config-network, p-cpe:/a:amazon:linux:libvirt-daemon-config-nwfilter, p-cpe:/a:amazon:linux:libvirt-daemon-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-interface-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-interface, p-cpe:/a:amazon:linux:libvirt-daemon-driver-network-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-network, p-cpe:/a:amazon:linux:libvirt-daemon-driver-nodedev-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-nodedev, p-cpe:/a:amazon:linux:libvirt-daemon-driver-nwfilter-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-nwfilter, p-cpe:/a:amazon:linux:libvirt-daemon-driver-qemu-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-qemu, p-cpe:/a:amazon:linux:libvirt-daemon-driver-secret-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-secret, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-core-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-core, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-disk-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-disk, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-logical-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage-logical, p-cpe:/a:amazon:linux:libvirt-daemon-driver-storage, p-cpe:/a:amazon:linux:libvirt-daemon-kvm, p-cpe:/a:amazon:linux:libvirt-daemon-lock-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-lock, p-cpe:/a:amazon:linux:libvirt-daemon-log-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-log, p-cpe:/a:amazon:linux:libvirt-daemon-plugin-lockd-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-plugin-lockd, p-cpe:/a:amazon:linux:libvirt-daemon-proxy-debuginfo, p-cpe:/a:amazon:linux:libvirt-daemon-proxy, p-cpe:/a:amazon:linux:libvirt-daemon-qemu, p-cpe:/a:amazon:linux:libvirt-daemon, p-cpe:/a:amazon:linux:libvirt-debuginfo, p-cpe:/a:amazon:linux:libvirt-debugsource, p-cpe:/a:amazon:linux:libvirt-devel, p-cpe:/a:amazon:linux:libvirt-docs, p-cpe:/a:amazon:linux:libvirt-libs-debuginfo, p-cpe:/a:amazon:linux:libvirt-libs, p-cpe:/a:amazon:linux:libvirt-nss-debuginfo, p-cpe:/a:amazon:linux:libvirt-nss, p-cpe:/a:amazon:linux:libvirt-ssh-proxy-debuginfo, p-cpe:/a:amazon:linux:libvirt-ssh-proxy, p-cpe:/a:amazon:linux:libvirt
必需的 KB 项: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
易利用性: No known exploits are available
补丁发布日期: 2026/9/14
漏洞发布日期: 2026/8/20
参考资料信息
CVE: CVE-2026-18917