What’s Vulnerable › Vulnerabilities

CVE-2021-3756: Heap-based Buffer Overflow in hoene/libmysofa

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-29 · updated 2026-06-17
• Weakness: CWE-122

Description

libmysofa is vulnerable to Heap-based Buffer Overflow

Affected products

• Fedoraproject Fedora: 34, 35
• Symonics Libmysofa: before 1.2.1 — fixed in 1.2.1

How to fix

Upgrade to a fixed version: Symonics Libmysofa 1.2.1. Check the vendor advisory for mitigations.

References

• https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1
• https://huntr.dev/bounties/7ca8d9ea-e2a6-4294-af28-70260bb53bc1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGQ45S4RH7MC42NHTAGOIHYR4C5IRTMZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WGY7TAZX2M4NYXXGNHIBBKKN5XMSMKQ4/
• https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1
• https://huntr.dev/bounties/7ca8d9ea-e2a6-4294-af28-70260bb53bc1
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGQ45S4RH7MC42NHTAGOIHYR4C5IRTMZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WGY7TAZX2M4NYXXGNHIBBKKN5XMSMKQ4/

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