CentOS Linux 8 [TuxCare] 安全更新：bpftool / kernel / kernel-core / kernel-cross-headers / 等 （CENTOS-STREAM8：CLSA-2026：1778839666）
high Nessus 插件 ID 352352
语言：
简介
CentOS Linux 主机缺少一个或多个安全更新。描述
如 TuxCare CENTOS- STREAM8：CLSA-2026：1778839666公告所述，CentOS Linux 8 主机上存在安装的程序包，该漏洞会受到漏洞的影响。- 已修复 Linux 内核中的下列漏洞：net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags.
Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
(CVE-2026-46300)
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
根据 TuxCare 公告 CENTOS-STREAM8：CLSA-2026：1778839666 中的指南更新受影响的程序包。另见
插件详情
严重性: High
ID: 352352
文件名: tuxcare_centos_8_CLSA-2026-1778839666.nasl
版本: 1.2
类型: Local
代理: unix
发布时间: 2026/9/30
最近更新时间: 2026/10/1
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: Critical
分数: 9.5
百分位: 99.87
Vendor
Vendor Severity: Important
CVSS v2
风险因素: Medium
基本分数: 6.8
时间分数: 5.9
矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 分数来源: CVE-2026-46300
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 7.5
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:H/RL:O/RC:C
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
可利用: true
易利用性: Exploits are available
补丁发布日期: 2026/5/15
漏洞发布日期: 2026/5/13
可利用的方式
Core Impact
Metasploit (Fragnesia LPE (CVE-2026-46300))
参考资料信息
CVE: CVE-2026-46300
CLSA: 2026:1778839666