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CVE-2026-72297

HIGHCVSS 7.1/10EPSS 0.21%

Last modified

CVE-2026-72297 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Probability
0.21%

11.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1a6dda72455b399ce9c1a12695471dc4d5c61add; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2b3e241729e87afed13ac0f666472d5d6ca42e87; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 367acd288bc6255e247cb1a1efbf5c6567cab423; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 513f820b3f0cf4462e17d84c39ed3948d061a6ea; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 806b7b6edc8446e8b94b706807a7090a14d47b5c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cdf19f380e46192e7084be559638aab1f6ed86a2
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-72297?
CVE-2026-72297 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72297?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST