CVE-2026-5318 LibRaw JPEG DHT losslessjpeg.cpp initval out-of-bounds write
Remote attackers can trigger an out-of-bounds write in LibRaw's JPEG parser, potentially leading to code execution or crashes.
- 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-2026-5318?
CVE-2026-5318 is a medium-severity memory corruption vulnerability in Libraw Libraw, published on 2 Apr 2026. 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
A weakness has been identified in LibRaw up to 0.22.0. This impacts the function HuffTable::initval of the file src/decompressors/losslessjpeg.cpp of the component JPEG DHT Parser. This manipulation of the argument bits[] causes out-of-bounds write. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 0.22.1 will fix this issue. Patch name: a6734e867b19d75367c05f872ac26322464e3995. It is advisable to upgrade the affected component.
Which versions are affected by CVE-2026-5318?
It affects 1 product.
Products include Libraw Libraw.
How do I fix CVE-2026-5318?
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-2026-5318 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5318 exists.
Other vulnerabilities in Libraw Libraw
Sources
Also known as DEBIAN-CVE-2026-5318, GHSA-8qw7-rqx6-9gqj, JLSEC-2026-1117, UBUNTU-CVE-2026-5318.