CVE-2026-85509Network attack vectorHinoki check available

Remote memory corruption via oversized BMC response

Published Sep 4, 2026 · Updated Sep 4, 2026

Stack overflow in GNU FreeIPMI before 1.6.19 allows remote attackers controlling a BMC response to corrupt process memory. _read_fru_data in libfreeipmi/fru/ipmi-fru.c copies returned FRU bytes into a stack buffer without constraining the response length to the requested byte count. Triggering the flaw requires a BMC that returns an oversized FRU response; the overwrite can crash the calling tool or corrupt its execution.

CVSS severity9.8
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stack overflow in GNU FreeIPMI before 1.6.19 allows remote attackers controlling a BMC response to corrupt process memory. _read_fru_data in libfreeipmi/fru/ipmi-fru.c copies returned FRU bytes into a stack buffer without constraining the response length to the requested byte count. Triggering the flaw requires a BMC that returns an oversized FRU response; the overwrite can crash the calling tool or corrupt its execution.

The record

CVE
CVE-2026-85509
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The GnuPG Project
Product
FreeIPMI
Classifications
CWE-121, T1203
Attack vector
network
Privileges
unauthenticated

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=0 <1.6.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The GnuPG Project · FreeIPMIversion=0 <1.6.19

Published CVSS scores

9.8MITRECVSS:3.1/AV:N/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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

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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