UNKNOWN NVD
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
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.
References
- 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
This unknown severity vulnerability was published on 2026-08-15 via NVD.
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