CVE-2026-93140
Description
A flaw was found in the Linux kernel's Universal Disk Format (UDF) filesystem. When an I/O error occurs during the writing of the Logical Volume Integrity Descriptor (LVID) buffer, the system incorrectly clears a flag indicating the buffer's validity. Subsequent operations, such as remounting the filesystem, can trigger a spurious warning in the kernel's buffer management, even though the in-memory data remains valid. While not directly leading to data corruption, such incorrect warnings can obscure critical system issues or impact system stability.
Statement
This vulnerability is rated as Low impact because triggering the condition requires underlying write errors on a mounted UDF filesystem and only produces a non-fatal kernel warning stack trace. Exploitation does not result in privilege escalation or data corruption, and standard enterprise deployments rarely mount writable UDF volumes. Additionally, mounting storage devices typically requires administrative privileges or direct physical access, significantly limiting exposure for unprivileged users.
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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