RHSA-2026:47248
Vulnerability from csaf_redhat - Published: 2026-07-28 21:10 - Updated: 2026-08-07 11:57Summary
Red Hat Security Advisory: kernel security update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)
* kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)
* kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)
* kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the Linux kernel on ARM processors. A race condition in Translation Lookaside Buffer Invalidation (TLBI) operations during memory permission changes allows a local attacker to write to memory resources owned by higher privilege levels. This could allow an unprivileged local attacker to gain kernel privileges or a guest VM to escape to the hypervisor, resulting in complete system compromise.
8.4 (High)
Affected products
Fixed
50 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.src | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-abi-stablelists-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-common-x86_64-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-doc-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-libs-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:python3-perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:python3-perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:bpftool-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:bpftool-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-0:4.18.0-305.200.1.el8_4.src | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-abi-stablelists-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-common-x86_64-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-doc-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-libs-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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Threats
Impact
Important
A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a `privcmd` memory region. This action causes a Virtual Memory Area (VMA) to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed twice, a condition known as a double free, which can cause system instability or a denial of service.
7.3 (High)
Affected products
Fixed
50 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-0:4.18.0-305.200.1.el8_4.x86_64 | — |
Vendor Fix
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.src | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-abi-stablelists-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debug-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-debuginfo-common-x86_64-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-doc-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-tools-libs-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:python3-perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-common-x86_64-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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Threats
Impact
Moderate
A flaw was found in the Linux kernel. The `ipc_idr_alloc()` function, used in the checkpoint/restore path for SysV Inter-Process Communication (IPC) ID allocation, does not properly limit ID allocation to the valid range. This can result in the system attempting to dereference freed memory, leading to a use-after-free vulnerability. This issue could potentially cause system instability or information disclosure.
5.8 (Medium)
Affected products
Fixed
50 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:bpftool-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.src | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-abi-stablelists-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.AUS:kernel-core-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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Threats
Impact
Moderate
A flaw was found in the Linux kernel's device-mapper log (dm log) component. A local attacker could exploit an integer overflow vulnerability where a 64-bit value is truncated to 32 bits, leading to undersized memory allocations. This allows for out-of-bounds writes to kernel memory during log operations. Successful exploitation of this flaw can cause a kernel crash, resulting in a Denial of Service (DoS) for the affected system.
6.3 (Medium)
Affected products
Fixed
50 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debug-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-debuginfo-common-x86_64-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-devel-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-doc-0:4.18.0-305.200.1.el8_4.noarch | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:kernel-tools-libs-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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| Unresolved product id: BaseOS-8.4.0.Z.EUS.EXTENSION:python3-perf-debuginfo-0:4.18.0-305.200.1.el8_4.x86_64 | — |
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Threats
Impact
Moderate
References
27 references
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)\n\n* kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)\n\n* kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)\n\n* kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
{
"category": "legal_disclaimer",
"text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
"title": "Terms of Use"
}
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"publisher": {
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"contact_details": "https://access.redhat.com/security/team/contact/",
"issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
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"summary": "https://access.redhat.com/errata/RHSA-2026:47248",
"url": "https://access.redhat.com/errata/RHSA-2026:47248"
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"summary": "https://access.redhat.com/security/updates/classification/#important",
"url": "https://access.redhat.com/security/updates/classification/#important"
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464092"
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"summary": "2486958",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486958"
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"summary": "2492277",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492277"
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"summary": "Canonical URL",
"url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_47248.json"
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"title": "Red Hat Security Advisory: kernel security update",
"tracking": {
"current_release_date": "2026-08-07T11:57:36+00:00",
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"cve": "CVE-2025-10263",
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"name": "Incorrect Privilege Assignment"
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"discovery_date": "2026-06-09T11:01:37.157725+00:00",
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"text": "2486958"
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{
"category": "description",
"text": "A flaw was found in the Linux kernel on ARM processors. A race condition in Translation Lookaside Buffer Invalidation (TLBI) operations during memory permission changes allows a local attacker to write to memory resources owned by higher privilege levels. This could allow an unprivileged local attacker to gain kernel privileges or a guest VM to escape to the hypervisor, resulting in complete system compromise.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in the Linux kernel on ARM processors, allowing a local unprivileged attacker to achieve privilege escalation to kernel level or a guest virtual machine to escape to the hypervisor. The vulnerability stems from a race condition during Translation Lookaside Buffer Invalidation (TLBI) operations when memory permissions are altered, enabling writes to higher exception level resources.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-10263"
},
{
"category": "external",
"summary": "RHBZ#2486958",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486958"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-10263",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-10263"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-10263",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-10263"
},
{
"category": "external",
"summary": "https://developer.arm.com/documentation/112137",
"url": "https://developer.arm.com/documentation/112137"
}
],
"release_date": "2026-06-09T09:23:18.802000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-28T21:10:04+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources"
},
{
"cve": "CVE-2026-31787",
"cwe": {
"id": "CWE-763",
"name": "Release of Invalid Pointer or Reference"
},
"discovery_date": "2026-04-30T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2464092"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s xen/privcmd module. A local user could exploit this by performing a partial unmapping of a `privcmd` memory region. This action causes a Virtual Memory Area (VMA) to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed twice, a condition known as a double free, which can cause system instability or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: xen/privcmd: fix double free via VMA splitting",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-31787"
},
{
"category": "external",
"summary": "RHBZ#2464092",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464092"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31787",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31787"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31787",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31787"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026043034-CVE-2026-31787-f6cc@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026043034-CVE-2026-31787-f6cc@gregkh/T"
}
],
"release_date": "2026-04-30T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-28T21:10:04+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
"cvss_v3": {
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"attackVector": "LOCAL",
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"baseScore": 7.3,
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"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
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"category": "impact",
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"title": "kernel: xen/privcmd: fix double free via VMA splitting"
},
{
"cve": "CVE-2026-52923",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-06-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2492094"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. The `ipc_idr_alloc()` function, used in the checkpoint/restore path for SysV Inter-Process Communication (IPC) ID allocation, does not properly limit ID allocation to the valid range. This can result in the system attempting to dereference freed memory, leading to a use-after-free vulnerability. This issue could potentially cause system instability or information disclosure.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ipc: limit next_id allocation to the valid ID range",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "SysV IPC checkpoint restore next_id allocation can escape the valid IPC id range because ipc_idr_alloc used an open ended idr_alloc upper bound. A crafted local sequence can leave a shared memory object stored in an out of range IDR slot, while later removal truncates the encoded id and removes a different in range slot. This can leave a stale IDR pointer to freed shared memory state, and a later /proc/sysvipc/shm walk can dereference freed memory. Impact is local denial of service.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-52923"
},
{
"category": "external",
"summary": "RHBZ#2492094",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492094"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-52923",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-52923"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-52923",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52923"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52923-35fb@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52923-35fb@gregkh/T"
}
],
"release_date": "2026-06-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-28T21:10:04+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
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"attackVector": "LOCAL",
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"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ipc: limit next_id allocation to the valid ID range"
},
{
"cve": "CVE-2026-53059",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2026-06-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2492277"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s device-mapper log (dm log) component. A local attacker could exploit an integer overflow vulnerability where a 64-bit value is truncated to 32 bits, leading to undersized memory allocations. This allows for out-of-bounds writes to kernel memory during log operations. Successful exploitation of this flaw can cause a kernel crash, resulting in a Denial of Service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: dm log: fix out-of-bounds write due to region_count overflow",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-53059"
},
{
"category": "external",
"summary": "RHBZ#2492277",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492277"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-53059",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-53059"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53059",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53059"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026062401-CVE-2026-53059-f32e@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026062401-CVE-2026-53059-f32e@gregkh/T"
}
],
"release_date": "2026-06-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-28T21:10:04+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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{
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
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]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: dm log: fix out-of-bounds write due to region_count overflow"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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