CVE-2026-80599

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-67475 (ENISA EUVD) · GHSA-j72w-p49p-cjqq (GitHub Security Advisories)Source: ENISA EUVD

8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 28, 2026

Last Modified

October 16, 2026

Advisory Details (8)

Auto-updated Aug 29, 2026
Patch available.
Web page

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
Web page

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
Web page

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
Web page

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
Web page

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
Web page

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
Web page

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
Web page

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.

Patch Availability(13)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(13)

Data Freshness Timeline

(refreshed 10× in last 7d / 74× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 209 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 109 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-29 15:55 UTCEG score recompute
  6. 2026-10-29 15:55 UTCVendor advisory
  7. 2026-10-29 15:55 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  12. 2026-10-25 13:59 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-23 06:15 UTCEG score recompute
  16. 2026-10-23 06:15 UTCVendor advisory
  17. 2026-10-23 06:15 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  18. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-10-18 03:10 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-10-16 20:32 UTCEG score recompute
Show 75 more
  1. 2026-10-16 20:32 UTCVendor advisory
  2. 2026-10-16 20:32 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  3. 2026-10-16 19:37 UTCEG score recompute
  4. 2026-10-16 19:37 UTCVendor advisory
  5. 2026-10-16 19:37 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  6. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-13 06:28 UTCEG score recompute
  11. 2026-10-13 06:27 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  12. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-10-12 14:57 UTCEG score recompute
  14. 2026-10-11 19:21 UTCEG score recompute
  15. 2026-10-11 16:37 UTCEG score recompute
  16. 2026-10-11 13:55 UTCEG score recompute
  17. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-10-10 14:04 UTCVendor advisory
  20. 2026-10-10 14:04 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  21. 2026-10-10 01:23 UTCEG score recompute
  22. 2026-10-10 01:23 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  23. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-10-09 02:47 UTCEG score recompute
  25. 2026-10-09 02:47 UTCVendor advisory
  26. 2026-10-09 02:47 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  27. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  28. 2026-10-08 00:59 UTCEG score recompute
  29. 2026-10-08 00:59 UTCVendor advisory
  30. 2026-10-08 00:59 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  31. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  32. 2026-10-07 09:10 UTCVendor advisory
  33. 2026-10-07 09:10 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  34. 2026-10-06 20:31 UTCEG score recompute
  35. 2026-10-06 20:31 UTCVendor advisory
  36. 2026-10-06 20:31 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  37. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  38. 2026-10-06 07:29 UTCEG score recompute
  39. 2026-10-06 07:29 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  40. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  41. 2026-10-05 17:12 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  42. 2026-10-05 04:33 UTCEG score recompute
  43. 2026-10-05 04:33 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  44. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  45. 2026-10-04 15:42 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  46. 2026-10-04 03:03 UTCEG score recompute
  47. 2026-10-04 03:03 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  48. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  49. 2026-10-03 14:24 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  50. 2026-10-02 22:59 UTCEG score recompute
  51. 2026-10-02 22:59 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  52. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-10-02 10:00 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  54. 2026-10-01 21:22 UTCEG score recompute
  55. 2026-10-01 21:22 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  56. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  57. 2026-10-01 08:35 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  58. 2026-09-30 19:51 UTCEG score recompute
  59. 2026-09-30 19:51 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  60. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  61. 2026-09-30 03:57 UTCEG score recompute
  62. 2026-09-30 03:57 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  63. 2026-09-29 09:55 UTCEG score recompute
  64. 2026-09-29 09:55 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  65. 2026-09-28 21:11 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  66. 2026-09-28 05:36 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  67. 2026-09-27 16:58 UTCEG score recompute
  68. 2026-09-27 16:57 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  69. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  70. 2026-09-27 04:19 UTCEG score recompute
  71. 2026-09-27 04:19 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  72. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  73. 2026-09-26 15:39 UTCEG score recompute
  74. 2026-09-26 15:39 UTCGHSA enrichmentGHSA-j72w-p49p-cjqq · GitHub severity HIGH · GitHub CVSS 8.1
  75. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile

Frequently asked(5)

What is CVE-2026-80599?
CVE-2026-80599 is a high-severity vulnerability; its CVE record was 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 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…
When was the CVE record for CVE-2026-80599 published?
The CVE record for CVE-2026-80599 was published on August 28, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-80599 actively exploited?
CVE-2026-80599 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-80599?
CVE-2026-80599 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-80599?
A fix for CVE-2026-80599 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-80599 are linked in the Vendor Advisories panel on this page.

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