CVE-2026-72297net: atm: reject out-of-range traffic classes in QoS validation
- 7.1HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 1a6dda72455b399ce9c1a12695471dc4d5c61add
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2b3e241729e87afed13ac0f666472d5d6ca42e87
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 367acd288bc6255e247cb1a1efbf5c6567cab423
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 513f820b3f0cf4462e17d84c39ed3948d061a6ea
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 806b7b6edc8446e8b94b706807a7090a14d47b5c
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cdf19f380e46192e7084be559638aab1f6ed86a2
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/1a6dda72455b399ce9c1a12695471dc4d5c61add (opens in a new tab)
- https://git.kernel.org/stable/c/2b3e241729e87afed13ac0f666472d5d6ca42e87 (opens in a new tab)
- https://git.kernel.org/stable/c/367acd288bc6255e247cb1a1efbf5c6567cab423 (opens in a new tab)
- https://git.kernel.org/stable/c/513f820b3f0cf4462e17d84c39ed3948d061a6ea (opens in a new tab)
- https://git.kernel.org/stable/c/15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5 (opens in a new tab)
- https://git.kernel.org/stable/c/e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7 (opens in a new tab)
- https://git.kernel.org/stable/c/806b7b6edc8446e8b94b706807a7090a14d47b5c (opens in a new tab)
- https://git.kernel.org/stable/c/cdf19f380e46192e7084be559638aab1f6ed86a2 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59196 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72297)Record last updated .