CVE-2026-46198

Kernel memory corruption via signed position overflow

Published May 28, 2026 · Updated May 28, 2026

Integer overflow in Linux Kernel batman-adv allows attackers to read and corrupt kernel memory via crafted OGMs on the same mesh segment. In batadv_iv_ogm_send_to_if, buff_pos is stored as s16 while batadv_iv_ogm_aggr_packet validates packet size as int, allowing the position to wrap before buffer access. Exploitation requires an unauthenticated mesh neighbor and a large-MTU interface, and can disclose or overwrite kernel memory or trigger a kernel panic.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux Kernel batman-adv allows attackers to read and corrupt kernel memory via crafted OGMs on the same mesh segment. In batadv_iv_ogm_send_to_if, buff_pos is stored as s16 while batadv_iv_ogm_aggr_packet validates packet size as int, allowing the position to wrap before buffer access. Exploitation requires an unauthenticated mesh neighbor and a large-MTU interface, and can disclose or overwrite kernel memory or trigger a kernel panic.

The record

CVE
CVE-2026-46198
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=2.6.38
  2. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <0799e5943611006b346b8813c7daf7dd5aa26bfd
  3. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <974542d1efc48b7e9fe16184e647615cba39969b
  4. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <b252797bfced986d6d92ec2f4cfcca842ce8aa78
  5. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <bf872db54f91ffe70104b98c20068b2d5910e018
  6. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <f61499359fa529f0d45a53bf7c573a49eb6322e6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.38; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <0799e5943611006b346b8813c7daf7dd5aa26bfd; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <974542d1efc48b7e9fe16184e647615cba39969b; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <b252797bfced986d6d92ec2f4cfcca842ce8aa78; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <bf872db54f91ffe70104b98c20068b2d5910e018; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <f61499359fa529f0d45a53bf7c573a49eb6322e6

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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