CVE-2026-72003

Kernel memory corruption via short SAE frame

Published Aug 15, 2026 · Updated Aug 15, 2026

Heap overflow in the Linux brcmfmac CYW driver allows physically proximate attackers to corrupt kernel memory via a short SAE frame. brcmf_notify_auth_frame_rx subtracts the 24-byte management-header offset from an unchecked unsigned frame length, causing memcpy to copy far beyond its kzalloc buffer. A rogue or malfunctioning access point must deliver the truncated frame during external SAE authentication, after which the overflow can crash the host or enable kernel code execution.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in the Linux brcmfmac CYW driver allows physically proximate attackers to corrupt kernel memory via a short SAE frame. brcmf_notify_auth_frame_rx subtracts the 24-byte management-header offset from an unchecked unsigned frame length, causing memcpy to copy far beyond its kzalloc buffer. A rogue or malfunctioning access point must deliver the truncated frame during external SAE authentication, after which the overflow can crash the host or enable kernel code execution.

The record

CVE
CVE-2026-72003
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-805, T1203
Attack vector
adjacent
Privileges
unauthenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.16
  2. Affected versionversion=66f909308a7c05082919ff214a0bbe2a76aa0283 <185bb156c427d0f865d344a6d0eaa02c6d05cc57
  3. Affected versionversion=66f909308a7c05082919ff214a0bbe2a76aa0283 <240c8d2c717b3f8153e7e877b22a82518d78dbdc
  4. Affected versionversion=66f909308a7c05082919ff214a0bbe2a76aa0283 <55b26abb1fa1ec406b3ad11b43c49c7624257565

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=66f909308a7c05082919ff214a0bbe2a76aa0283 <185bb156c427d0f865d344a6d0eaa02c6d05cc57; version=66f909308a7c05082919ff214a0bbe2a76aa0283 <240c8d2c717b3f8153e7e877b22a82518d78dbdc; version=66f909308a7c05082919ff214a0bbe2a76aa0283 <55b26abb1fa1ec406b3ad11b43c49c7624257565

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/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

CWE-805Buffer Access with Incorrect Length Value
T1203Exploitation for Client Execution

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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