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CVE-2021-41556

10.0 CRITICAL

sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Ex...

Published: 2022-07-28 · Last updated: 2026-05-29

Severity and scoring

CVSS
10.0 CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-125

Affected products

VendorProduct
fedoraprojectfedora, squirrel
squirrel-langfedora, squirrel

Description

sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Execution. If a victim executes an attacker-controlled squirrel script, it is possible for the attacker to break out of the squirrel script sandbox even if all dangerous functionality such as File System functions has been disabled. An attacker might abuse this bug to target (for example) Cloud services that allow customization via SquirrelScripts, or distribute malware through video games that embed a Squirrel Engine.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-9541 — A security flaw has been discovered in Squirrel up to 3.2 (5.3 MEDIUM)
  • CVE-2024-28960 — An issue was discovered in Mbed TLS 2.18.0 through 2.28.x before 2.28.8 and 3.x before 3.6.0, and Mbed Crypto (8.2 HIGH)
  • CVE-2023-51767 — OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer ... (7.0 HIGH)
  • CVE-2023-43615 — Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow (7.5 HIGH)
  • CVE-2023-25136 — OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling (6.5 MEDIUM)

Same CWE

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  • CVE-2026-54412 — LiamBindle MQTT-C through version 1.1.6 contains a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_respons... (8.2 HIGH)
  • CVE-2025-9033 — Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Co... (7.8 HIGH)
  • CVE-2025-9032 — Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed Windows PE file may allow Local Executio... (7.8 HIGH)
  • CVE-2025-7017 — Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed Windows MSI file may allow Local Executi... (7.8 HIGH)