CVE-2026-2240
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Out-of-Bounds Read in janet-lang janetc_pop_funcdef Function

Publication date: 2026-02-09

Last updated on: 2026-04-29

Assigner: VulDB

Description
A vulnerability has been found in janet-lang janet up to 1.40.1. The impacted element is the function janetc_pop_funcdef of the file src/core/compile.c. Such manipulation leads to out-of-bounds read. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The name of the patch is 4dd08a4cdef5b1c42d9a2c19fc24412e97ef51d5. A patch should be applied to remediate this issue.
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Meta Information
Published
2026-02-09
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2026-02-09
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2240
EUVD
EUVD-2026-6908
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
janet-lang janet to 1.40.1 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Compliance Impact

I don't know

Detection Guidance

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Executive Summary

This vulnerability exists in the janet-lang janet software up to version 1.40.1, specifically in the function janetc_pop_funcdef within the file src/core/compile.c.

The issue allows an attacker to cause an out-of-bounds read, which means the program reads memory outside the intended boundaries.

The attack must be performed locally, and a patch has been released to fix this problem.

Impact Analysis

The vulnerability can lead to an out-of-bounds read, which may cause the program to access unintended memory locations.

According to the CVSS scores, the impact on confidentiality and integrity is none, but there is a low impact on availability.

Since the attack requires local access and has a low severity score, the overall impact is limited but could potentially cause minor disruptions or crashes.

Mitigation Strategies

To mitigate this vulnerability, you should apply the patch named 4dd08a4cdef5b1c42d9a2c19fc24412e97ef51d5 to the janet-lang janet software.

Since the attack must be carried out locally, restricting local access to trusted users can also help reduce risk.

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