CVE-2026-80839Hinoki check available

Out-of-bounds access via truncated TVLV offset

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds access in affected Linux kernels allows attackers to access memory beyond skb data via a malformed batman-adv multicast TVLV. batadv_tvlv_call_handler() stores an unrepresentable TVLV end in a 16-bit transport-header offset, truncating it before batadv_mcast_forw_packet() accepts an oversized tracker. The batman-adv multicast receive path must process the TVLV; public sources establish invalid kernel-memory access but not data disclosure or a reliable service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds access in affected Linux kernels allows attackers to access memory beyond skb data via a malformed batman-adv multicast TVLV. batadv_tvlv_call_handler() stores an unrepresentable TVLV end in a 16-bit transport-header offset, truncating it before batadv_mcast_forw_packet() accepts an oversized tracker. The batman-adv multicast receive path must process the TVLV; public sources establish invalid kernel-memory access but not data disclosure or a reliable service interruption.

The record

CVE
CVE-2026-80839
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <1b466746fe109127fd983100a228cdd1f1f6ece2
  2. Affected versionversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <2b46baa591d0a7c16b62f150917187e70d053be6
  3. Affected versionversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <916ec741e65af072b98e475feaad98c063da1b7c
  4. Affected versionversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <da1f5aa7ec93f2cc17f5cd30efc54f62af433cf2
  5. Affected versionversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <f12c2de4f542e3220e17e0606f492110064f04cb
  6. Affected versionversion=6.8

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <1b466746fe109127fd983100a228cdd1f1f6ece2; version=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <2b46baa591d0a7c16b62f150917187e70d053be6; version=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <916ec741e65af072b98e475feaad98c063da1b7c; version=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <da1f5aa7ec93f2cc17f5cd30efc54f62af433cf2; version=07afe1ba288c04280622fa002ed385f1ac0b6fe6 <f12c2de4f542e3220e17e0606f492110064f04cb; version=6.8

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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