CVE-2021-3673
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a...
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
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
7.5
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
CVE-2021-3673- 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 - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-20, CWE-252
- Updated
- 2026-11-02
CVE List No score
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
CVE-2021-3673- Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2021-26965 No score
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
EUVD-2021-26965- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-45j6-6fww-gqv4
7.5
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a...
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
GHSA-45j6-6fww-gqv4- 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-20, CWE-252
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-3673
7.5
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
ALPINE-CVE-2021-3673- 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
7.5
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
CVE-2021-3673- 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-2021-3673
7.5
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS.
- Record
UBUNTU-CVE-2021-3673- 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
OSVMGASA-2022-0440 No score
Updated radare2/rizin packages fix security vulnerability
In radare2 through 5.3.0 there is a double free vulnerability in the pyc parse via a crafted file which can lead to DoS. (CVE-2021-32613)
A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhaustion and DoS. (CVE-2021-3673)
A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS. (CVE-2021-4021)
radareorg radare2 version 5.5.2 is vulnerable to NULL Pointer Dereference via libr/bin/p/bin_symbols.c binary symbol parser. (CVE-2021-44974)
radareorg radare2 5.5.2 is vulnerable to Buffer Overflow via /libr/core/anal_objc.c mach-o parser. (CVE-2021-44975)
radare2 is vulnerable to Out-of-bounds Read. (CVE-2022-0173)
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.6.0. (CVE-2022-0419)
Denial of Service in GitHub repository radareorg/radare2 prior to 5.6.4. (CVE-2022-0476)
Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.6.2. (CVE-2022-0518)
Buffer Access with Incorrect Length Value in GitHub repository radareorg/radare2 prior to 5.6.2. (CVE-2022-0519)
Use After Free in NPM radare2.js prior to 5.6.2. (CVE-2022-0520)
Access of Memory Location After End of Buffer in GitHub repository radareorg/radare2 prior to 5.6.2. (CVE-2022-0521)
Access of Memory Location Before Start of Buffer in NPM radare2.js prior to 5.6.2. (CVE-2022-0522)
Expired Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.6.2. (CVE-2022-0523)
Use After Free in GitHub repository radareorg/radare2 prior to 5.6.2. (CVE-2022-0559)
Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.6.4. (CVE-2022-0676)
Denial of Service in GitHub repository radareorg/radare2 prior to 5.6.4. (CVE-2022-0695)
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.6.4. (CVE-2022-0712)
Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.6.4. (CVE-2022-0713)
- Record
MGASA-2022-0440- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11295-1 No score
radare2-5.3.1-2.2 on GA media
These are all security issues fixed in the radare2-5.3.1-2.2 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11295-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
radare2Alpine:v3.18 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.19 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.20 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.21 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.22 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.23 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Alpine:v3.24 |
before 5.4.0-r0 | 5.4.0-r0 |
radare2Mageia:8 From an advisory covering 19 CVEs |
before 5.6.4-1.mga8 | 5.6.4-1.mga8 |
radare2-cutterMageia:8 From an advisory covering 19 CVEs |
before 2.0.4-2.mga8 | 2.0.4-2.mga8 |
rizinMageia:8 From an advisory covering 19 CVEs |
before 0.3.1-1.mga8 | 0.3.1-1.mga8 |
Show 8 moreShow less
| Package | Affected | Fixed |
|---|---|---|
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 |
radare2Ubuntu:Pro:24.04:LTS |
All versions, plus listed versions 5.5.0+dfsg-1ubuntu15.5.0+dfsg-1.1ubuntu25.5.0+dfsg-1.1ubuntu35.5.0+dfsg-1.1ubuntu3+esm1 |
None known |
radare2Ubuntu:25.10 |
All versions, plus listed versions 5.9.8+dfsg-25.9.8+dfsg-2ubuntu0.25.10.15.9.8+dfsg-2ubuntu0.25.10.2 |
None known |
radare2Ubuntu:26.10 |
All versions, plus listed versions 6.0.7+ds-16.1.6+ds-26.1.6+ds-36.1.8+ds-1 |
None known |
radare2Ubuntu:26.04:LTS |
All versions, plus listed versions 5.9.8+dfsg-26.0.4+dfsg-16.0.7+ds-1 |
None known |
radare2openSUSE:Tumbleweed From an advisory covering 3 CVEs |
before 5.3.1-2.2 | 5.3.1-2.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected, aliases, 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-2021-3673 is a high vulnerability (CVSS 7.5) in Radare Radare2, published August 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.81%, the 78th percentile. Fixed in radare2 5.4.0-r0.
References
bugzilla.redhat.com/show_bug.cgi?id=1989130
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIARALLVVY2362AYFSFULTZKIW6QO5R5
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NFQPEPMLAOQNGZG5OHSPZBNONGG4DDJO
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XGOU2EFE7YK2YDRNFV6QFUWW2SL2GGQA
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKGIB52R4XPCPNEW6GF56EHW7ST24IJU
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IQIRJ72UALGMSWH6MYPVJQQLXFGZ23RS
Show 23 moreShow less
nvd.nist.gov/vuln/detail/CVE-2021-3673
lists.fedoraproject.org/archives/list/[email protected]/message/IQIRJ72UALGMSWH6MYPVJQQLXFGZ23RS
lists.fedoraproject.org/archives/list/[email protected]/message/JIARALLVVY2362AYFSFULTZKIW6QO5R5
lists.fedoraproject.org/archives/list/[email protected]/message/NFQPEPMLAOQNGZG5OHSPZBNONGG4DDJO
lists.fedoraproject.org/archives/list/[email protected]/message/SKGIB52R4XPCPNEW6GF56EHW7ST24IJU
lists.fedoraproject.org/archives/list/[email protected]/message/XGOU2EFE7YK2YDRNFV6QFUWW2SL2GGQA
github.com/advisories/GHSA-45j6-6fww-gqv4
security.alpinelinux.org/vuln/CVE-2021-3673
advisories.mageia.org/MGASA-2022-0440.html
bugs.mageia.org/show_bug.cgi?id=29163
lists.fedoraproject.org/archives/list/[email protected]/thread/V2UL4V4XKSFJVNNUMFV443UJXGDBYGS4
lists.fedoraproject.org/archives/list/[email protected]/thread/JIARALLVVY2362AYFSFULTZKIW6QO5R5
lists.fedoraproject.org/archives/list/[email protected]/thread/IQIRJ72UALGMSWH6MYPVJQQLXFGZ23RS
lists.fedoraproject.org/archives/list/[email protected]/thread/E6YBRQ3UCFWJVSOYIKPVUDASZ544TFND
openwall.com/lists/oss-security/2022/05/25/1
census-labs.com/news/2022/05/24/multiple-vulnerabilities-in-radare2
ubuntu.com/security/CVE-2021-3673
github.com/radareorg/radare2/issues/18923
github.com/radareorg/radare2/commit/d7ea20fb2e1433ebece9f004d87ad8f2377af23d
cve.org/CVERecord?id=CVE-2021-3673
suse.com/security/cve/CVE-2017-10929
suse.com/security/cve/CVE-2021-32613
suse.com/security/cve/CVE-2021-3673