JerryScript 2.4.0 js-lexer.c lexer_parse_number heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in JerryScript 2.4.0. It has been classified as critical. This vulnerability affects the function lexer_parse_number of the file js-lexer.c. This manipulation causes heap-based overflow. The identification of this vulnerability is CVE-2021-26195. There is no exploit available.

Detailsinfo

A vulnerability was found in JerryScript 2.4.0. It has been declared as critical. Affected by this vulnerability is the function lexer_parse_number of the file js-lexer.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 06/11/2021. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2021-26195. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 262842 (Linux Distros Unpatched Vulnerability : CVE-2021-26195), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (262842). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 262842
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-26195

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/25/2021 🔍
06/11/2021 +136 days 🔍
06/11/2021 +0 days 🔍
09/10/2025 +1552 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-26195 (🔍)
GCVE (CVE): GCVE-0-2021-26195
GCVE (VulDB): GCVE-100-176839

Entryinfo

Created: 06/11/2021 13:36
Updated: 09/10/2025 20:40
Changes: 06/11/2021 13:36 (36), 06/13/2021 13:57 (3), 09/10/2025 20:40 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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