CVE-2021-3674Public exploit

Memory corruption via invalid ELF section offset

Published Mar 24, 2023 · Updated Feb 25, 2025

Out-of-bounds reads in Rizin after 0.2.1 allow local users to corrupt memory during analysis of a crafted ELF file. create_section_from_phdr accepts an invalid section offset and pushes a section whose name can retain a garbage value, corrupting memory when callbacks consume the object. The user-interaction gate is opening attacker-supplied ELF content; the published PoC demonstrates a crash, while reliable code execution is unproven.

CVSS severity7.8
High
EPSS probability0.41%
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 reads in Rizin after 0.2.1 allow local users to corrupt memory during analysis of a crafted ELF file. create_section_from_phdr accepts an invalid section offset and pushes a section whose name can retain a garbage value, corrupting memory when callbacks consume the object. The user-interaction gate is opening attacker-supplied ELF content; the published PoC demonstrates a crash, while reliable code execution is unproven.

The record

CVE
CVE-2021-3674
Published
Mar 24, 2023
Updated
Feb 25, 2025
Vendor
Rizin Organization
Product
Rizin
Classifications
CWE-119, CWE-125, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2025Record 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=affected rizin after version v0.2.1 until commit 1e0c34946dddf9b8e5e63933aefacf2b26d08103

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Rizin Organization · Rizinversion=affected rizin after version v0.2.1 until commit 1e0c34946dddf9b8e5e63933aefacf2b26d08103

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution

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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