CVE-2026-72297

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
EG Score
7.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (8)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e62adb157c2eaad9ad4867ec6cd9af5b9a51b1c7
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cdf19f380e46192e7084be559638aab1f6ed86a2
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/806b7b6edc8446e8b94b706807a7090a14d47b5c
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/513f820b3f0cf4462e17d84c39ed3948d061a6ea
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/367acd288bc6255e247cb1a1efbf5c6567cab423
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b3e241729e87afed13ac0f666472d5d6ca42e87
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a6dda72455b399ce9c1a12695471dc4d5c61add
generic

net: atm: reject out-of-range traffic classes in QoS validation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/15444b57fdc6fc3f3e22a87f791ae5be81e6ecf5

Vendor Advisories for CVE-2026-72297(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 30× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 20:57 UTCGHSA enrichment
  3. 2026-08-20 08:37 UTCGHSA enrichment
  4. 2026-08-19 20:18 UTCEG score recompute
  5. 2026-08-19 20:18 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 07:58 UTCGHSA enrichment
  8. 2026-08-18 19:39 UTCEG score recompute
  9. 2026-08-18 19:39 UTCGHSA enrichment
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 07:19 UTCGHSA enrichment
  13. 2026-08-17 19:00 UTCEG score recompute
  14. 2026-08-17 19:00 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 06:19 UTCEG score recompute
  17. 2026-08-17 06:19 UTCGHSA enrichment
  18. 2026-08-17 05:59 UTCEG score recompute▲ 7.10
  19. 2026-08-17 05:59 UTCGHSA enrichment
  20. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.1 · severity → HIGH
  21. 2026-08-17 05:30 UTCEG score recompute
  22. 2026-08-17 05:30 UTCGHSA enrichment
  23. 2026-08-17 05:24 UTCMITRE cvelistV5
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 5 more
  1. 2026-08-16 02:15 UTCEPSS rescore
  2. 2026-08-15 06:37 UTCGHSA enrichment
  3. 2026-08-15 06:23 UTCNVD update
  4. 2026-08-15 06:07 UTCEG score recompute
  5. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72297?
CVE-2026-72297 is a high vulnerability published on August 15, 2026. 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 ATMANYCLASS in checktp(). SOATMQOS stores the supplied QoS after checkqos() succeeds, so accepting larger values leaves invalid…
When was CVE-2026-72297 disclosed?
CVE-2026-72297 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72297 actively exploited?
CVE-2026-72297 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.4% of all scored CVEs.
What is the CVSS score of CVE-2026-72297?
CVE-2026-72297 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-72297?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72297, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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