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NVD / CVE Program· CNA Linux

CVE-2026-72232: batman-adv: ensure minimal ethernet header on TX

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 38cd10b0aeec755d89f78722a2b83f4088ff0cb0, 49df66b7993c80b80c7eb9a84ba5b3410c8296a0, 58799078afebd5115e052bf69ad6697f9759dd6f.

Low priority for now. Upgrade to Linux Linux 38cd10b0aeec755d89f78722a2b83f4088ff0cb0, 49df66b7993c80b80c7eb9a84ba5b3410c8296a0, 58799078afebd5115e052bf69ad6697f9759dd6f 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: ensure minimal ethernet header on TX As documented in commit 8bd67ebb50c0 ("net: bridge: xmit: make sure we have at least eth header len bytes"), it is possible by for a local user with eBPF TC hook access to attach a tc filter which truncates the packet and redirects to an batadv interface. But the code assumes that at least ETH_HLEN bytes are available and thus might read outside of the available buffer. The batadv_interface_tx() must therefore always check itself if enough data is available for the ethernet header and don't rely on min_header_len.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
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-2026-72232

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

    • 2.6.38affected
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 58799078afebd5115e052bf69ad6697f9759dd6faffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 38cd10b0aeec755d89f78722a2b83f4088ff0cb0affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 811fea37620f2097955d95ce81cfdba03fd30f1baffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before e6640923afee619d9fa82b07394dc9498e202304affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 6b4f521e01257387906f8b969ad3450d8208d4e2affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 9e16b6751a8206de0b865d99bb02771e6751d12daffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before dbeb4145d9778f922f459935da9a027750765a69affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 49df66b7993c80b80c7eb9a84ba5b3410c8296a0affected · git
    • before 2.6.38not 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-2026-72230Aug 15, 2026 · batman-adv: frag: free unfragmentable packet
    0Monitor
  • ← EarlierCVE-2026-72231Aug 15, 2026 · batman-adv: tt: avoid request storms during pending request
    30Monitor
  • Later →CVE-2026-72233Aug 15, 2026 · batman-adv: bla: reacquire gw address 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 Linux38cd10b0aeec755d89f78722a2b83f4088ff0cb0Vendor (CNA)
Linux Linux49df66b7993c80b80c7eb9a84ba5b3410c8296a0Vendor (CNA)
Linux Linux58799078afebd5115e052bf69ad6697f9759dd6fVendor (CNA)
Linux Linux6b4f521e01257387906f8b969ad3450d8208d4e2Vendor (CNA)
Linux Linux811fea37620f2097955d95ce81cfdba03fd30f1bVendor (CNA)
Linux Linux9e16b6751a8206de0b865d99bb02771e6751d12dVendor (CNA)
Linux Linuxdbeb4145d9778f922f459935da9a027750765a69Vendor (CNA)
Linux Linuxe6640923afee619d9fa82b07394dc9498e202304Vendor (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).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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