Amazon Linux 2023：libvirt、libvirt-client、libvirt-client-qemu （ALAS2023-2026-2139）
high Nessus Plugin ID 345790
語言:
概要
遠端 Amazon Linux 2023 主機缺少一個安全性更新。說明
因此，它會受到 ALAS2023-2026-2139 公告中提及的一個弱點影響。在 libvirt 中發現一個缺陷。無特權的本機使用者可能會利用 NodeGetFreePages RPC 處理常式中的整數溢位弱點。此缺陷允許特製的值繞過大小檢查，從而導致記憶體緩衝區過小。隨後，實際的 NUMA 節點資料可以覆寫此緩衝區。此堆積緩衝區溢位可能會損毀根 libvirt 精靈的記憶體，進而可能導致拒絕服務或本機權限提升。（CVE-2026-18917）
Tenable 已直接從所測試產品的安全公告擷取前置描述區塊。
請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼作出判斷。
解決方案
執行 'dnf update libvirt --releasever 2023.12.20260914' 或 'dnf update --advisory ALAS2023-2026-2139 --releasever 2023.12.20260914' 來更新您的系統。另請參閱
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-2139.html
Plugin 詳細資訊
嚴重性: High
ID: 345790
檔案名稱: al2023_ALAS2023-2026-2139.nasl
版本: 1.1
類型: Local
代理程式: unix
已發布: 2026/9/14
已更新: 2026/9/14
支援的感應器: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
風險資訊
VPR
風險因素: Medium
分數: 4.9
百分位數: 58.19
CVSS v2
風險因素: Medium
基本分數: 6.8
時間性分數: 5
媒介: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 評分資料來源: CVE-2026-18917
CVSS v3
風險因素: High
基本分數: 7.8
時間性分數: 6.8
媒介: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
時間媒介: CVSS:3.0/E:U/RL:O/RC:C
弱點資訊
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
必要的 KB 項目: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
可輕鬆利用: No known exploits are available
修補程式發佈日期: 2026/9/14
弱點發布日期: 2026/8/20
參考資訊
CVE: CVE-2026-18917