CentOS Linux 8.5 [TuxCare] 安全性更新：bpftool / kernel / kernel-core / kernel-cross-headers 等多個弱點 （CENTOS8.5：CLSA-2026：1787572220）
critical Nessus Plugin ID 351684
語言:
概要
CentOS Linux 主機缺少一個或多個安全性更新。說明
CentOS Linux 8.5 主機安裝的套件會受到 TuxCare CENTOS8.5：CLSA-2026：1787572220 公告中提及的多個弱點影響。- 已解決 Linux 核心中的下列弱點：ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection. (CVE-2025-21758)
- 已解決 Linux 核心中的下列弱點：ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection. (CVE-2025-21759)
- 已解決 Linux 核心中的下列弱點：ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF. (CVE-2025-21760)
- 已解決 Linux 核心中的下列弱點：openvswitch: use RCU protection in ovs_vport_cmd_fill_info() ovs_vport_cmd_fill_info() can be called without RTNL or RCU. Use RCU protection and dev_net_rcu() to avoid potential UAF. (CVE-2025-21761)
- 已解決 Linux 核心中的下列弱點：arp: use RCU protection in arp_xmit() arp_xmit() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
(CVE-2025-21762)
請注意，Nessus 並未測試這些問題，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
根據 TuxCare 公告 CENTOS8.5：CLSA-2026：1787572220 中的指引更新受影響的套件。另請參閱
Plugin 詳細資訊
嚴重性: Critical
ID: 351684
檔案名稱: tuxcare_centos_8.5_CLSA-2026-1787572220.nasl
版本: 1.1
類型: Local
代理程式: unix
已發布: 2026/9/30
已更新: 2026/9/30
支援的感應器: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
風險資訊
VPR
風險因素: High
分數: 7.9
百分位數: 99.36
Vendor
Vendor Severity: Critical
CVSS v2
風險因素: Critical
基本分數: 10
時間性分數: 7.8
媒介: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS 評分資料來源: CVE-2026-23112
CVSS v3
風險因素: Critical
基本分數: 9.8
時間性分數: 8.8
媒介: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
時間媒介: CVSS:3.0/E:P/RL:O/RC:C
弱點資訊
必要的 KB 項目: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party
可被惡意程式利用: true
可輕鬆利用: Exploits are available
修補程式發佈日期: 2026/8/24
弱點發布日期: 2024/4/9
參考資訊
CVE: CVE-2025-21758, CVE-2025-21759, CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21763, CVE-2025-21765, CVE-2026-23112, CVE-2026-31786, CVE-2026-31787, CVE-2026-43125, CVE-2026-43198, CVE-2026-64266, CVE-2026-64298, CVE-2026-64564, CVE-2026-68287
CLSA: 2026:1787572220