MiracleLinux 8 : kernel-4.18.0-553.125.1.el8_10 (AXBA:2026-723:38)

high Nessus Plugin ID 317071

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Synopsis

The remote MiracleLinux host is missing one or more security updates.

Description

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXBA:2026-723:38 advisory.

- In the Linux kernel, the following vulnerability has been resolved: 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)

- In the Linux kernel, the following vulnerability has been resolved: 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)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 317071

File Name: miracle_linux_AXBA-2026-723.nasl

Version: 1.2

Type: Local

Family: Miracle Linux Local Security Checks

Published: 5/27/2026

Updated: 6/2/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.4

Vendor

Vendor Severity: N/a

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-46300

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

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

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/MiracleLinux/release, Host/MiracleLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/27/2026

Vulnerability Publication Date: 5/13/2026

Reference Information

CVE: CVE-2026-46300, CVE-2026-46333

Detections

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