CVE-2026-102504 Denial of service in tonycoz:imager
An attacker can cause a denial of service by providing a crafted raw image with an invalid channel count, triggering an uncatchable process exit in the Imager Perl library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102504?
CVE-2026-102504 is a high-severity denial of service vulnerability in tonycoz:imager, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Imager versions before 1.037 for Perl exit the process reading a raw image with an out-of-range raw_datachannels value in i_readraw_wiol.
Nothing range-checks raw_datachannels. The line buffer is sized as the image width times the channel count with no overflow check, so a negative or very large count requests an excessive allocation. When it fails, Imager's allocator calls exit(3).
Passing an untrusted raw_datachannels value to Imager->read() triggers an uncatchable exit.
Which versions are affected by CVE-2026-102504?
It affects 1 product.
Products include Tonycoz Imager.
How do I fix CVE-2026-102504?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-102504 being exploited?
There is no known exploitation of CVE-2026-102504 in the wild and no public exploit code.
Other vulnerabilities in tonycoz:imager
Sources
Also known as DEBIAN-CVE-2026-102504, GHSA-g549-r73g-x7x6, UBUNTU-CVE-2026-102504.