CVE-2020-5496 Memory corruption in n/a
A heap-based buffer overflow in FontForge allows attackers to execute arbitrary code or cause a denial of service via crafted font files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-5496?
CVE-2020-5496 is a high-severity memory corruption vulnerability in Opensuse Leap, published on 3 Jan 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.
Weakness: CWE-787
Which versions are affected by CVE-2020-5496?
It affects 2 products.
Products include Fontforge Fontforge, Opensuse Leap.
How do I fix CVE-2020-5496?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-5496 being exploited?
There is no known exploitation of CVE-2020-5496 in the wild and no public exploit code.
Other vulnerabilities in Opensuse Leap
- CVE-2019-15785 Memory corruption in n/a
- CVE-2025-15269 FontForge SFD File Parsing Use-After-Free Remote Code Execution Vulnerability
- CVE-2025-15270 FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability
- CVE-2025-15271 FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability
- CVE-2025-15272 FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Sources
Also known as DEBIAN-CVE-2020-5496, GHSA-v4hc-3q2q-94jp, UBUNTU-CVE-2020-5496.