CVE-2026-35170Public exploit

Heap-memory disclosure and crash via unchecked bitstream length

Published Apr 6, 2026 · Updated Apr 6, 2026

Out-of-bounds read in openFPGALoader 1.1.1 and earlier allows attackers to disclose heap data or crash it via a crafted .bit file. BitParser::parseHeader() trusts the file's 16-bit big-endian length, advances pos_data without checking buffer bounds, then indexes the string at an attacker-controlled offset. A user must load the malicious file; no FPGA hardware is required, and the demonstrated consequences are heap-memory disclosure and a program crash.

CVSS severity7.1
High
EPSS probability0.17%
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 openFPGALoader 1.1.1 and earlier allows attackers to disclose heap data or crash it via a crafted .bit file. BitParser::parseHeader() trusts the file's 16-bit big-endian length, advances pos_data without checking buffer bounds, then indexes the string at an attacker-controlled offset. A user must load the malicious file; no FPGA hardware is required, and the demonstrated consequences are heap-memory disclosure and a program crash.

The record

CVE
CVE-2026-35170
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
trabucayre
Product
openFPGALoader
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 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=<= 1.1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

trabucayre · openFPGALoaderversion=<= 1.1.1

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

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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