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NVD / CVE Program· CNA Linux

CVE-2026-80599: batman-adv: dat: ensure accessible eth_hdr proto field

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 26560c4a03dc4d607331600c187f59ab2df5f341, 3c62694c31f043568c3f4784b8d247cc3bea6b4c, 4407ff3af469356f9641c4a6e7072309bae86bea.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 26560c4a03dc4d607331600c187f59ab2df5f341, 3c62694c31f043568c3f4784b8d247cc3bea6b4c, 4407ff3af469356f9641c4a6e7072309bae86bea or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 8.1 · v3.1—No exploit Fix available
Published
Aug 28, 2026
Updated
Oct 16, 2026
EPSS
0.4% · 36th percentile
CWE
—

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-80599

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.13affected
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before da3677b5ed362742d30ceab31bfafcdc74dc2642affected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 6d3ea37074bb747f745d28138f87745ba9bd97c5affected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 7913935d41f166c367bbf7cc76a79e50044388e8affected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 3c62694c31f043568c3f4784b8d247cc3bea6b4caffected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 5836a050d02e9598fa0f71e88dde28b63dfa35e3affected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 8f76277d02176cd739945bba3379448e2e22e799affected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 4407ff3af469356f9641c4a6e7072309bae86beaaffected · git
    • be1db4f6615b5e6156c807ea8985171c215c2d57 and later · before 26560c4a03dc4d607331600c187f59ab2df5f341affected · git
    • before 3.13not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80593Aug 28, 2026 · hwmon: (asus_atk0110) Check package count before accessing element
    33Monitor
  • ← EarlierCVE-2026-80598Aug 28, 2026 · ntfs3: fix out-of-bounds read in decompress_lznt
    31Monitor
  • Later →CVE-2026-80601Aug 28, 2026 · batman-adv: gw: acquire ethernet header only after skb realloc
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux26560c4a03dc4d607331600c187f59ab2df5f341Vendor (CNA)
Linux Linux3c62694c31f043568c3f4784b8d247cc3bea6b4cVendor (CNA)
Linux Linux4407ff3af469356f9641c4a6e7072309bae86beaVendor (CNA)
Linux Linux5836a050d02e9598fa0f71e88dde28b63dfa35e3Vendor (CNA)
Linux Linux6d3ea37074bb747f745d28138f87745ba9bd97c5Vendor (CNA)
Linux Linux7913935d41f166c367bbf7cc76a79e50044388e8Vendor (CNA)
Linux Linux8f76277d02176cd739945bba3379448e2e22e799Vendor (CNA)
Linux Linuxda3677b5ed362742d30ceab31bfafcdc74dc2642Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records