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NVD / CVE Program· CNA Linux

CVE-2026-72235: batman-adv: retrieve ethhdr after potential skb realloc on RX

Noroxi assessment

Priority: Monitor (action score 35/100)

  • 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: 0.34% (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 035e1fed892d3d06002a73ff73668f618a514644, 2cefa5141cab8ec1e4b24cf585958b13f2e3049d, 6abf73589bed3f27ee240c08108feb72bed0b9c6.

Low priority for now. Upgrade to Linux Linux 035e1fed892d3d06002a73ff73668f618a514644, 2cefa5141cab8ec1e4b24cf585958b13f2e3049d, 6abf73589bed3f27ee240c08108feb72bed0b9c6 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: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.3% · 28th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.8
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-2026-72235

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 6e189f14d1ea28db212b9d70a02131a7ce518012affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before a1820344b180cb55af748f102bc536b5c93164dbaffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 6abf73589bed3f27ee240c08108feb72bed0b9c6affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before f19259395b44af67f3c274e34237c295b526b859affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 2cefa5141cab8ec1e4b24cf585958b13f2e3049daffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 85a71a81854e0e191ad0e533eabb4eff54866febaffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before b031fc97e1993d29d6c3a0e86a99140528cf31e8affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 035e1fed892d3d06002a73ff73668f618a514644affected · 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-2026-72233Aug 15, 2026 · batman-adv: bla: reacquire gw address after skb realloc
    35Monitor
  • ← EarlierCVE-2026-72234Aug 15, 2026 · batman-adv: access unicast_ttvn skb->data only after skb realloc
    39Monitor
  • Later →CVE-2026-72240Aug 15, 2026 · mfd: sm501: Fix reference leak on failed device registration
    0Monitor

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 Linux035e1fed892d3d06002a73ff73668f618a514644Vendor (CNA)
Linux Linux2cefa5141cab8ec1e4b24cf585958b13f2e3049dVendor (CNA)
Linux Linux6abf73589bed3f27ee240c08108feb72bed0b9c6Vendor (CNA)
Linux Linux6e189f14d1ea28db212b9d70a02131a7ce518012Vendor (CNA)
Linux Linux85a71a81854e0e191ad0e533eabb4eff54866febVendor (CNA)
Linux Linuxa1820344b180cb55af748f102bc536b5c93164dbVendor (CNA)
Linux Linuxb031fc97e1993d29d6c3a0e86a99140528cf31e8Vendor (CNA)
Linux Linuxf19259395b44af67f3c274e34237c295b526b859Vendor (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 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
high · data or configuration can be modified
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
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/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