CVE-2026-23386

Description

A flaw was found in the Linux kernel, specifically within the gve network driver. When the driver operates in DQ-QPL (Data Queue - Queue Pair List) mode, the gve_tx_clean_pending_packets() function incorrectly processes buffer cleanup. This error can cause the system to attempt to unmap memory at incorrect locations and access memory outside of allocated bounds, potentially leading to system instability or a denial of service.

Statement

This flaw affects Google Cloud Platform virtual machines using the gve network driver in DQ-QPL mode. The buffer cleanup code incorrectly interprets QPL buffer IDs as DMA addresses and can access beyond array bounds. This triggers UBSAN warnings and potential memory corruption during driver reset or close operations. Specific to GCP environments with gve driver.

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 HatNVDcve.org
Base Score5.55.5N/A
Attack VectorLocalLocalN/A
Attack ComplexityLowLowN/A
Privileges RequiredLowLowN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactHighHighN/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)

CWE-1285

Other

Technical Impact: Varies by Context

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