CVE-2020-23303
CVE-2020-23303 is a critical-severity vulnerability in Jerryscript with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Jerryscript
- Published:
- Last modified:
Description
There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.
Frequently asked questions
- What is CVE-2020-23303?
- There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.
- How severe is CVE-2020-23303?
- CVE-2020-23303 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-23303 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-23303?
- CVE-2020-23303 affects Jerryscript. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-23303?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-23303 published?
- CVE-2020-23303 was published on 2021-06-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jerryscript:jerryscript:2.2.0:*:*:*:*:*:*:*
More vulnerabilities in Jerryscript
- CVE-2023-36109 — Critical (CVSS 9.8): Buffer Overflow vulnerability in JerryScript version 3.0, allows remote attackers to execute arbitrary code via…
- CVE-2023-38961 — Critical (CVSS 9.8): Buffer Overflwo vulnerability in JerryScript Project jerryscript v.3.0.0 allows a remote attacker to execute arbitrary…
- CVE-2020-22597 — Critical (CVSS 9.8): An issue in Jerrscript- project Jerryscrip v. 2.3.0 allows a remote attacker to execute arbitrary code via the…
- CVE-2021-42863 — Critical (CVSS 9.8): A buffer overflow in ecma_builtin_typedarray_prototype_filter() in JerryScript version fe3a5c0 allows an attacker to…
- CVE-2021-43453 — Critical (CVSS 9.8): A Heap-based Buffer Overflow vulnerability exists in JerryScript 2.4.0 and prior versions via an out-of-bounds read in…
- CVE-2021-41752 — Critical (CVSS 9.8): Stack overflow vulnerability in Jerryscript before commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 on Oct 20, 2021 due…
All CVEs affecting Jerryscript →
Other CWE-787 (Out-of-bounds Write) vulnerabilities
- CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
- CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src modules). This vulnerability is…
- CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
- CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
- CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
- CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…