CVE-2026-72431
Description
A flaw was found in the Linux kernel. A vulnerability exists in the /proc/allocinfo feature where the system may attempt to access memory after it has been freed, known as a use-after-free. This can happen when a kernel module is unloaded while the system is still processing information from /proc/allocinfo that references the module's memory. A local attacker could potentially exploit this flaw to cause a system crash, leading to a Denial of Service.
Statement
This vulnerability is rated as Moderate severity because exploitation requires local access and concurrent module removal to trigger memory corruption, limiting the potential blast radius to a local denial of service. The underlying allocation tagging mechanisms are not included in supported Red Hat Enterprise Linux releases, leaving default deployments unaffected.
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 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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