CVE-2026-80599

HIGHPre-NVD 8.18.1
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. 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: dat: ensure accessible eth_hdr proto field

When batadv_get_vid() accesses the proto field of the ethernet header, it is not checking if the data itself is accessible. The caller is responsible for it. But in contrast to other call sites, batadv_dat_get_vid() and its caller didn't make sure this is true. This could have caused an out-of-bounds access.

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
20%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 29, 2026

Advisory Details (8)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26560c4a03dc4d607331600c187f59ab2df5f341
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4407ff3af469356f9641c4a6e7072309bae86bea
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8f76277d02176cd739945bba3379448e2e22e799
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5836a050d02e9598fa0f71e88dde28b63dfa35e3
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3c62694c31f043568c3f4784b8d247cc3bea6b4c
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7913935d41f166c367bbf7cc76a79e50044388e8
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6d3ea37074bb747f745d28138f87745ba9bd97c5
generic

batman-adv: dat: ensure accessible eth_hdr proto field - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/da3677b5ed362742d30ceab31bfafcdc74dc2642

Vendor Advisories for CVE-2026-80599(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 12× in last 7d / 12× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 20:06 UTCEG score recompute
  3. 2026-08-29 20:06 UTCGHSA enrichment
  4. 2026-08-29 07:27 UTCEG score recompute
  5. 2026-08-29 07:27 UTCGHSA enrichment
  6. 2026-08-29 06:37 UTCEG score recompute 8.10
  7. 2026-08-29 06:37 UTCGHSA enrichment
  8. 2026-08-29 06:33 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
  9. 2026-08-28 21:42 UTCEPSS rescore
  10. 2026-08-28 08:20 UTCNVD update
  11. 2026-08-28 07:37 UTCEG score recompute
  12. 2026-08-28 07:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80599?
CVE-2026-80599 is a high vulnerability published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: ensure accessible eth_hdr proto field When batadvgetvid() accesses the proto field of the ethernet header, it is not checking if the data itself is accessible. The caller is responsible for it. But in contrast to…
When was CVE-2026-80599 disclosed?
CVE-2026-80599 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80599 actively exploited?
CVE-2026-80599 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 80.3% of all scored CVEs.
What is the CVSS score of CVE-2026-80599?
CVE-2026-80599 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-80599?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80599, 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

Explore the affected products and dependency analysis for CVE-2026-80599

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