CVE-2026-20911 Memory corruption in LibRaw

Critical 9.8 Published 7 Apr 2026 Updated 15 Jul 2026

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-2026-20911?

CVE-2026-20911 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 HuffTable::initval functionality of LibRaw Commit 0b56545 and 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.

Weakness: CWE-120, CWE-131

Which versions are affected by CVE-2026-20911?

It affects 1 product.

Products include Libraw Libraw.

How do I fix CVE-2026-20911?

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-2026-20911 being exploited?

There is no known exploitation of CVE-2026-20911 in the wild and no public exploit code.

All Libraw Libraw vulnerabilities

Sources

Also known as AZL-82943, DEBIAN-CVE-2026-20911, GHSA-rc49-6x7v-hf76, JLSEC-2026-1114, UBUNTU-CVE-2026-20911.