CVE-2026-72227

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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:

batman-adv: mcast: avoid OOB read of num_dests header

Before the access to struct batadv_tvlv_mcast_tracker's num_dests, it is attempted to check whether enough space is actually in the network header. But instead of using offsetofend() to check for the whole size (2) which must be accessible, offsetof() of is called. The latter is always returning

  • The comparison with the network header length will always return that
enough data is available - even when only 1 or 0 bytes are accessible.

Instead of using offsetofend(), use the more common check for the whole header.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (4)

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

batman-adv: mcast: avoid OOB read of num_dests header - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d2b657c9653fcebca828a2ead13f444e0da68817
generic

batman-adv: mcast: avoid OOB read of num_dests header - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/80f62893d135f415e7a374dd47b468ec298f7aed
generic

batman-adv: mcast: avoid OOB read of num_dests header - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7d1a877670bc2e901241073f022ca8d1b2f85f1c
generic

batman-adv: mcast: avoid OOB read of num_dests header - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/38eaed28e250895d56f4b7989bd65479a511c5c3

Vendor Advisories for CVE-2026-72227(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 31× in last 7d / 31× 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. 2026-08-21 01:49 UTCEG score recompute
  2. 2026-08-21 01:49 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 12:47 UTCGHSA enrichment
  5. 2026-08-19 23:43 UTCEG score recompute
  6. 2026-08-19 23:43 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 10:40 UTCGHSA enrichment
  9. 2026-08-18 21:37 UTCEG score recompute
  10. 2026-08-18 21:37 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 08:30 UTCGHSA enrichment
  14. 2026-08-17 19:23 UTCEG score recompute
  15. 2026-08-17 19:23 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 06:20 UTCEG score recompute
  18. 2026-08-17 06:20 UTCGHSA enrichment
  19. 2026-08-17 05:59 UTCEG score recompute▲ 8.10
  20. 2026-08-17 05:59 UTCGHSA enrichment
  21. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
  22. 2026-08-17 05:31 UTCEG score recompute
  23. 2026-08-17 05:31 UTCGHSA enrichment
  24. 2026-08-17 05:25 UTCMITRE cvelistV5
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 6 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 02:15 UTCEPSS rescore
  3. 2026-08-15 06:40 UTCGHSA enrichment
  4. 2026-08-15 06:23 UTCNVD update
  5. 2026-08-15 06:09 UTCEG score recompute
  6. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72227?
CVE-2026-72227 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: mcast: avoid OOB read of num_dests header Before the access to struct batadvtvlvmcasttracker's numdests, it is attempted to check whether enough space is actually in the network header. But instead of using…
When was CVE-2026-72227 disclosed?
CVE-2026-72227 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-2026-72227 actively exploited?
CVE-2026-72227 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 73.4% of all scored CVEs.
What is the CVSS score of CVE-2026-72227?
CVE-2026-72227 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-72227?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72227, 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.

Dependency Blast Radius

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