CVE-2021-32613

Exp

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.

Published: 2021-05-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-32613 is rated Exploit Available (59.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.16%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-32613

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-32613

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.34% 1.16% +0.83%
2 2025-11-28 0.35% 0.34% -0.01%
3 2025-11-21 — 0.35% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-32613

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-32613

OS Trackers for CVE-2021-32613

vendor priority summary link
alpine medium CVE-2021-32613: 1 source package rows (radare2); 16 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 6, open 10. https://security.alpinelinux.org/vuln/CVE-2021-32613
debian not yet assigned CVE-2021-32613 not yet assigned priority: Debian including 1 source packages (radare2), 1 status rows across 1 suites (sid): resolved 1. https://security-tracker.debian.org/tracker/CVE-2021-32613
ubuntu medium CVE-2021-32613 medium priority: Ubuntu including 1 source packages (radare2), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 5, ignored 5, needs-triage 5, pending 1. https://ubuntu.com/security/CVE-2021-32613

Affected software / configurations for CVE-2021-32613

Vendor Product Version Raw CPE
radare radare2 <= 5.3.0 cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

References for CVE-2021-32613

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1959939 Issue Tracking Patch Third Party Advisory
https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05 Patch Third Party Advisory
https://github.com/radareorg/radare2/commit/a07dedb804a82bc01c07072861942dd80c6b6d62 Patch Third Party Advisory
https://github.com/radareorg/radare2/issues/18666 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/radareorg/radare2/issues/18667 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/radareorg/radare2/issues/18679 Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W3LPB5VGCIA7WA55FSB3YZQFUGZKWD7O/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3S7JB46PONPHXZHIMR2XDPLGJCN5ZIX/
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