CVE-2026-72232

Kernel memory disclosure and crash via truncated packet

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in Linux kernel batman-adv allows local users to disclose kernel memory or crash the system via a truncated packet. The batadv_interface_tx() function assumes at least ETH_HLEN bytes remain after an eBPF TC filter truncates a packet and redirects it to a batman-adv interface. Exploitation requires local eBPF TC hook access, and the buffer over-read is limited to memory disclosure or a system crash.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel batman-adv allows local users to disclose kernel memory or crash the system via a truncated packet. The batadv_interface_tx() function assumes at least ETH_HLEN bytes remain after an eBPF TC filter truncates a packet and redirects it to a batman-adv interface. Exploitation requires local eBPF TC hook access, and the buffer over-read is limited to memory disclosure or a system crash.

The record

CVE
CVE-2026-72232
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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 <38cd10b0aeec755d89f78722a2b83f4088ff0cb0
  3. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <49df66b7993c80b80c7eb9a84ba5b3410c8296a0
  4. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <58799078afebd5115e052bf69ad6697f9759dd6f
  5. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <6b4f521e01257387906f8b969ad3450d8208d4e2
  6. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <811fea37620f2097955d95ce81cfdba03fd30f1b
  7. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <9e16b6751a8206de0b865d99bb02771e6751d12d
  8. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <dbeb4145d9778f922f459935da9a027750765a69
  9. Affected versionversion=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <e6640923afee619d9fa82b07394dc9498e202304

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.38; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <38cd10b0aeec755d89f78722a2b83f4088ff0cb0; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <49df66b7993c80b80c7eb9a84ba5b3410c8296a0; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <58799078afebd5115e052bf69ad6697f9759dd6f; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <6b4f521e01257387906f8b969ad3450d8208d4e2; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <811fea37620f2097955d95ce81cfdba03fd30f1b; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <9e16b6751a8206de0b865d99bb02771e6751d12d; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <dbeb4145d9778f922f459935da9a027750765a69; version=c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <e6640923afee619d9fa82b07394dc9498e202304

Published CVSS scores

7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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