CVE-2026-74265

Received Received - Intake

Memory Corruption in Linux Kernel Mana Driver

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: net: mana: initialize gdma queue id to INVALID_QUEUE_ID mana_gd_create_mana_wq_cq() leaves queue->id as 0 (from kzalloc_obj()) until mana_create_wq_obj() assigns the firmware-returned id. If creation fails before that, cleanup calls mana_gd_destroy_cq() with id 0, NULLing gc->cq_table[0] and silently breaking whichever real CQ owns that slot. Initialize queue->id to INVALID_QUEUE_ID right after allocation, matching mana_gd_create_eq(). The existing (id >= max_num_cqs) guard then short-circuits cleanly.

CVSS Scores

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Meta Information

Published

2026-08-15

Last Modified

2026-08-17

Generated

2026-09-04

AI Q&A

2026-08-15

EPSS Evaluated

2026-09-03

NVD

CVE-2026-74265

EUVD

EUVD-2026-59412

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves improper initialization of a queue ID in the mana driver. When creating a queue, the ID is initially set to 0 by default. If the creation process fails before the firmware assigns a valid ID, cleanup code incorrectly uses ID 0, which can overwrite and break a valid queue that legitimately uses ID 0.

Detection Guidance

This vulnerability affects the Linux kernel's mana driver for Azure Network Adapter. Detection requires checking kernel logs for mana driver errors or queue initialization issues. Look for messages about CQ table corruption or invalid queue IDs. Commands: dmesg | grep mana, journalctl -k | grep mana, lsmod | grep mana

Impact Analysis

This flaw could cause system instability or crashes by corrupting valid queue data. It may lead to denial-of-service conditions or unexpected behavior in network operations handled by the mana driver.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a low-level Linux kernel issue related to queue management in the mana network driver. No evidence suggests it impacts data protection, privacy, or security controls required by these regulations.

Mitigation Strategies

Update the Linux kernel to the latest stable version that includes the fix. If immediate update is not possible, disable the mana driver module by running rmmod mana. Monitor system logs for any signs of exploitation or continued issues after mitigation.

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