CVE-2026-72297

In the Linux kernel, the following vulnerability has been resolved: net: atm: reject out-of-range traffic classes in QoS validation Reject ATM traffic classes above ATM_ANYCLASS in check_tp(). SO_ATMQOS stores the supplied QoS after check_qos() succeeds, so accepting larger values leaves invalid traffic_class values in vcc->qos. That bad state later reaches pvc_info(), which indexes class_name[] with vcc->qos.{rx,tp}.traffic_class. Values above ATM_ANYCLASS cause an out-of-bounds read when /proc/net/atm/pvc is read. Tighten the existing QoS validation so invalid traffic_class values are rejected at the point where user supplied QoS is accepted.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5
https://git.kernel.org/stable/c/1a6dda72455b399ce9c1a12695471dc4d5c61add
https://git.kernel.org/stable/c/2b3e241729e87afed13ac0f666472d5d6ca42e87
https://git.kernel.org/stable/c/367acd288bc6255e247cb1a1efbf5c6567cab423
https://git.kernel.org/stable/c/513f820b3f0cf4462e17d84c39ed3948d061a6ea
https://git.kernel.org/stable/c/806b7b6edc8446e8b94b706807a7090a14d47b5c
https://git.kernel.org/stable/c/cdf19f380e46192e7084be559638aab1f6ed86a2
https://git.kernel.org/stable/c/e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72297

Mitre link : CVE-2026-72297

CVE.ORG link : CVE-2026-72297

JSON object : View

Products Affected

No product.

CWE

No CWE.

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Values above ATM_ANYCLASS cause\nan out-of-bounds read when /proc/net/atm/pvc is read.\n\nTighten the existing QoS validation so invalid traffic_class values\nare rejected at the point where user supplied QoS is accepted."}], "lastModified": "2026-08-17T06:18:32.560", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}