CVE-2021-40656 Memory corruption in n/a
A buffer overflow in libsixel allows attackers to execute arbitrary code or cause denial of service via crafted input.
- 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-2021-40656?
CVE-2021-40656 is a high-severity memory corruption vulnerability in n/a, published on 8 Apr 2022. 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
libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867.
Weakness: CWE-787
Which versions are affected by CVE-2021-40656?
It affects 1 product.
Products include Libsixel Libsixel.
How do I fix CVE-2021-40656?
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-2021-40656 being exploited?
There is no known exploitation of CVE-2021-40656 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2021-40656, GHSA-46hw-rjq2-89r4, UBUNTU-CVE-2021-40656.