CVE-2020-27793
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c....
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
CVE-2020-27793- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
CVE List No score
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
CVE-2020-27793- Weakness
- CWE-193
- Updated
- 2026-11-02
EUVDEUVD-2020-20295 No score
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
EUVD-2020-20295- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wq2p-x6v8-v53j
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c....
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
GHSA-wq2p-x6v8-v53j- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
OSVALPINE-CVE-2020-27793
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
ALPINE-CVE-2020-27793- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
OSV
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
CVE-2020-27793- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-27793
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
- Record
UBUNTU-CVE-2020-27793- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
radare2Alpine:v3.18 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.19 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.20 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.21 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.22 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.23 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Alpine:v3.24 |
before 4.4.0-r0 | 4.4.0-r0 |
radare2Ubuntu:16.04:LTS |
All versions, plus listed versions 0.9.6-3.1ubuntu1 |
None known |
radare2Ubuntu:Pro:18.04:LTS |
All versions, plus listed versions 1.6.0+dfsg-12.0.0+dfsg-12.1.0+dfsg-12.3.0+dfsg-12.3.0+dfsg-22.3.0+dfsg-2ubuntu0.1~esm1 |
None known |
radare2Ubuntu:Pro:20.04:LTS |
All versions, plus listed versions 3.2.1+dfsg-5build14.0.0+dfsg-14.2.1+dfsg-14.2.1+dfsg-24.2.1+dfsg-2ubuntu0.1~esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, facts, references | OSV | |
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-27793 is a high vulnerability (CVSS 7.5) in Radare Radare2, published August 19, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.18%, the 67th percentile. Fixed in radare2 4.4.0-r0.
References
github.com/radareorg/radare2/issues/16304
nvd.nist.gov/vuln/detail/CVE-2020-27793
security.alpinelinux.org/vuln/CVE-2020-27793
ubuntu.com/security/CVE-2020-27793
cve.org/CVERecord?id=CVE-2020-27793