CVE-2020-27795Public exploit

Process crash via malformed adf command

Published Aug 19, 2022 · Updated Aug 4, 2024

Null pointer dereference in radare2 before 4.4.0 allows local users to crash the process by issuing a malformed adf command. The anal_fcn_data function calls r_anal_function_size_from_entry on the null result of r_anal_get_fcn_in before checking whether a function exists. Local command access is required, and exploitation terminates only the affected radare2 process.

CVSS severity7.5
High
EPSS probability1.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in radare2 before 4.4.0 allows local users to crash the process by issuing a malformed adf command. The anal_fcn_data function calls r_anal_function_size_from_entry on the null result of r_anal_get_fcn_in before checking whether a function exists. Local command access is required, and exploitation terminates only the affected radare2 process.

The record

CVE
CVE-2020-27795
Published
Aug 19, 2022
Updated
Aug 4, 2024
Vendor
radareorg
Product
radare2
Classifications
CWE-908, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=Fixed in v4.4.0.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

radareorg · radare2version=Fixed in v4.4.0.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1499.004Application or System Exploitation

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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