CentOS Linux 8 [TuxCare] 安全更新：bpftool / kernel / kernel-core / kernel-cross-headers / 等 （CENTOS-STREAM8：CLSA-2026：1779180837）
high Nessus 插件 ID 353209
语言：
简介
CentOS Linux 主机缺少一个或多个安全更新。描述
CentOS Linux 8 主机上存在安装的程序包，该程序包受到 TuxCare CENTOS- STREAM8：CLSA-2026：1779180837公告中提及的漏洞的影响。- 已修复 Linux 内核中的下列漏洞：ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer.
But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS).
Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional drop capabilities model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached last dumpability flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override. (CVE-2026-46333)
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-2026：1779180837 中的指南更新受影响的程序包。另见
插件详情
严重性: High
ID: 353209
文件名: tuxcare_centos_8_CLSA-2026-1779180837.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: High
分数: 8.9
百分位: 99.71
Vendor
Vendor Severity: Important
CVSS v2
风险因素: Medium
基本分数: 6.2
时间分数: 4.9
矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:N
CVSS 分数来源: CVE-2026-46333
CVSS v3
风险因素: High
基本分数: 7.8
时间分数: 7
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:P/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: 2026/5/19
漏洞发布日期: 2026/5/15
参考资料信息
CVE: CVE-2026-46333
CLSA: 2026:1779180837