MiracleLinux 8：kernel-4.18.0-553.125.1.el8_10 （AXBA：2026-723：38）
high Nessus 插件 ID 317071
语言：
简介
远程 MiracleLinux 主机缺少一个或多个安全更新。描述
远程 MiracleLinux 8 主机上存在安装的程序包，该程序包受到 AXBA：2026-723：38 公告中提及的多个漏洞的影响。- 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)
- 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 尚未测试这些问题，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
更新受影响的程序包。另见
插件详情
严重性: High
ID: 317071
文件名: miracle_linux_AXBA-2026-723.nasl
版本: 1.2
类型: Local
发布时间: 2026/5/27
最近更新时间: 2026/6/2
支持的传感器: Nessus Agent, Nessus
风险信息
VPR
风险因素: Critical
分数: 9.4
Vendor
Vendor Severity: N/a
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
CPE: p-cpe:/a:miracle:linux:kernel-modules, p-cpe:/a:miracle:linux:kernel-tools-libs-devel, p-cpe:/a:miracle:linux:kernel-devel, p-cpe:/a:miracle:linux:kernel-core, p-cpe:/a:miracle:linux:kernel-abi-stablelists, p-cpe:/a:miracle:linux:kernel-modules-extra, p-cpe:/a:miracle:linux:kernel-debug, p-cpe:/a:miracle:linux:kernel-tools-libs, p-cpe:/a:miracle:linux:perf, p-cpe:/a:miracle:linux:kernel-debug-modules, p-cpe:/a:miracle:linux:kernel-debug-devel, p-cpe:/a:miracle:linux:kernel-cross-headers, p-cpe:/a:miracle:linux:kernel-tools, cpe:/o:miracle:linux:8, p-cpe:/a:miracle:linux:kernel, p-cpe:/a:miracle:linux:python3-perf, p-cpe:/a:miracle:linux:bpftool, p-cpe:/a:miracle:linux:kernel-headers, p-cpe:/a:miracle:linux:kernel-debug-core, p-cpe:/a:miracle:linux:kernel-debug-modules-extra
必需的 KB 项: Host/local_checks_enabled, Host/cpu, Host/MiracleLinux/release, Host/MiracleLinux/rpm-list
可利用: true
易利用性: Exploits are available
补丁发布日期: 2026/5/27
漏洞发布日期: 2026/5/13
参考资料信息
CVE: CVE-2026-46300, CVE-2026-46333