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NVD / CVE Program· CNA Linux

CVE-2026-80601: batman-adv: gw: acquire ethernet header only after skb realloc

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: 0.40% (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 2760b38222c8828b075802342fe3b91eb823d542, 6c37f1166549c999ccd164b0cb6462d1ae68f8f6, 77880a3be88d378d60cc1e8f8ec70430e2ed0518.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2760b38222c8828b075802342fe3b91eb823d542, 6c37f1166549c999ccd164b0cb6462d1ae68f8f6, 77880a3be88d378d60cc1e8f8ec70430e2ed0518 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: gw: acquire ethernet header only after skb realloc The pskb_may_pull() called by batadv_get_vid() 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.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 28, 2026
Updated
Oct 16, 2026
EPSS
0.4% · 34th 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 · 0.4%

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-2026-80601

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

    • 3.14affected
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before 2760b38222c8828b075802342fe3b91eb823d542affected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before 6c37f1166549c999ccd164b0cb6462d1ae68f8f6affected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before b79884a5567bf788fb76c30832467cf6a56f3c0daffected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before afac8096bde4948e3caa7e4dd733867cfbd3018eaffected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before e3f4325e35dd6e76b80665f3510738ce34819753affected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before e6b43acd34b219b807e65096ce207b087942779daffected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before 916dac5f2944f63f07f7b501acbea6737dbbed0eaffected · git
    • 6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 and later · before 77880a3be88d378d60cc1e8f8ec70430e2ed0518affected · git
    • before 3.14not 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-2026-80598Aug 28, 2026 · ntfs3: fix out-of-bounds read in decompress_lznt
    31Monitor
  • ← EarlierCVE-2026-80599Aug 28, 2026 · batman-adv: dat: ensure accessible eth_hdr proto field
    32Monitor
  • Later →CVE-2026-80602Aug 28, 2026 · perf/x86/amd/lbr: Fix kernel address leakage
    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 Linux2760b38222c8828b075802342fe3b91eb823d542Vendor (CNA)
Linux Linux6c37f1166549c999ccd164b0cb6462d1ae68f8f6Vendor (CNA)
Linux Linux77880a3be88d378d60cc1e8f8ec70430e2ed0518Vendor (CNA)
Linux Linux916dac5f2944f63f07f7b501acbea6737dbbed0eVendor (CNA)
Linux Linuxafac8096bde4948e3caa7e4dd733867cfbd3018eVendor (CNA)
Linux Linuxb79884a5567bf788fb76c30832467cf6a56f3c0dVendor (CNA)
Linux Linuxe3f4325e35dd6e76b80665f3510738ce34819753Vendor (CNA)
Linux Linuxe6b43acd34b219b807e65096ce207b087942779dVendor (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
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