CVE-2026-64333
Description
A flaw was found in the Linux kernel's digi_acceleport USB serial driver. This vulnerability allows a local attacker with access to the affected USB serial device to corrupt the write buffer due to improper handling of write operations and timeouts. This could lead to arbitrary code execution, allowing the attacker to run malicious code, or cause system instability and denial of service (DoS).
Statement
This vulnerability is rated as Moderate severity because exploitation requires local access and the presence of specialized Digi AccelePort USB serial hardware attached to the host. On typical Red Hat Enterprise Linux systems, these legacy USB-to-serial adapters are rarely deployed in production, and unprivileged users do not normally have direct access to the corresponding serial device nodes. The primary impact is limited to a local denial of service via kernel buffer corruption, though privilege escalation cannot be fully excluded if an authenticated local user can interact with an active device.
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 | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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