CVE-2020-23302
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in...
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
CVE-2020-23302- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
CVE-2020-23302- Updated
- 2026-11-02
EUVDEUVD-2020-16050 No score
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
EUVD-2020-16050- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x87v-6qg8-4jhm No score
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in...
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
GHSA-x87v-6qg8-4jhm- Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
CVE-2020-23302- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-23302
There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
- Record
UBUNTU-CVE-2020-23302- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-23302 is a critical vulnerability (CVSS 9.8) in Jerryscript, published June 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.27%, the 70th percentile. No source names a fixed version.