CVE-2026-31542
Description
A flaw was found in the Linux kernel's x86/platform/uv component. When a socket is deconfigured, it is incorrectly mapped to SOCK_EMPTY instead of NUMA_NO_NODE. This improper handling can lead to a system panic during the allocation of UV hub information structures, resulting in a Denial of Service (DoS) for the affected system.
Statement
A Moderate flaw was found in the Linux kernel's x86/platform/uv component. This issue can lead to a system panic and Denial of Service on affected Red Hat Enterprise Linux and Red Hat In-Vehicle OS systems when a socket is deconfigured, due to improper handling of the deconfigured socket state.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
The attacker can gain access to otherwise unauthorized resources.
Integrity,Confidentiality,Other
Technical Impact: Modify Application Data; Modify Files or Directories; Read Application Data; Read Files or Directories; Other
Race conditions such as this kind may be employed to gain read or write access to resources not normally readable or writable by the user in question.
Integrity,Other
Technical Impact: Modify Application Data; Other
The resource in question, or other resources (through the corrupted one) may be changed in undesirable ways by a malicious user.
Non-Repudiation
Technical Impact: Hide Activities
If a file or other resource is written in this method, as opposed to a valid way, logging of the activity may not occur.
Non-Repudiation,Integrity
Technical Impact: Modify Files or Directories
In some cases it may be possible to delete files that a malicious user might not otherwise have access to -- such as log files.
Frequently Asked Questions
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