CVE-2026-20889 Memory corruption in LibRaw
A heap-based buffer overflow in LibRaw allows attackers to execute arbitrary code or cause denial of service via a malicious file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-20889?
CVE-2026-20889 is a critical memory corruption vulnerability in Libraw Libraw, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
Which versions are affected by CVE-2026-20889?
It affects 1 product.
Products include Libraw Libraw.
How do I fix CVE-2026-20889?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-20889 being exploited?
There is no known exploitation of CVE-2026-20889 in the wild and no public exploit code.
Other vulnerabilities in Libraw Libraw
Sources
Also known as AZL-82952, CLSA-2026-1783353880, DEBIAN-CVE-2026-20889, ECHO-502f-9006-e836, GHSA-9m8r-gj3p-r7rw, UBUNTU-CVE-2026-20889.