CVE-2020-27794

Exp

A double free issue was discovered in radare2 in cmd_info.c:cmd_info(). Successful exploitation could lead to modification of unexpected memory locations and potentially causing a crash.

Published: 2022-08-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-27794 is rated High Exploit Risk (70.9/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.88%). 1 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-2020-27794

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

Exploit prediction scoring system (EPSS) score for CVE-2020-27794

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 0.32% 0.88% +0.56%
2 2026-05-28 0.38% 0.32% -0.06%
3 2025-11-21 — 0.38% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-27794

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2020-27794

OS Trackers for CVE-2020-27794

vendor priority summary link
alpine critical CVE-2020-27794: 1 source package rows (radare2); 10 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 4. https://security.alpinelinux.org/vuln/CVE-2020-27794
debian not yet assigned CVE-2020-27794 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-2020-27794
ubuntu medium CVE-2020-27794 medium priority: Ubuntu including 1 source packages (radare2), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 6, DNE 2, ignored 2, needed 2, released 1. https://ubuntu.com/security/CVE-2020-27794

Affected software / configurations for CVE-2020-27794

Vendor Product Version Raw CPE
radare radare2 < 4.4.0 cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:*

References for CVE-2020-27794

URL Tags
https://github.com/radareorg/radare2/commit/cb8b683758edddae2d2f62e8e63a738c39f92683 Patch Third Party Advisory
https://github.com/radareorg/radare2/issues/16303 Exploit Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence