CVE-2026-72297
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1a6dda72455b399ce9c1a12695471dc4d5c61add | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2b3e241729e87afed13ac0f666472d5d6ca42e87 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 367acd288bc6255e247cb1a1efbf5c6567cab423 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 513f820b3f0cf4462e17d84c39ed3948d061a6ea | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 806b7b6edc8446e8b94b706807a7090a14d47b5c | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cdf19f380e46192e7084be559638aab1f6ed86a2 | affected |
| Linux | Linux | 2.6.12 | affected |
| Linux | Linux | 0 < 2.6.12 | unaffected |
| Linux | Linux | 5.10.261 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.97 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.40 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- 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/15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5
- https://git.kernel.org/stable/c/e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7
- https://git.kernel.org/stable/c/806b7b6edc8446e8b94b706807a7090a14d47b5c
- https://git.kernel.org/stable/c/cdf19f380e46192e7084be559638aab1f6ed86a2
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