# 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.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Oct 2026
- **Updated:** 1 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-102504, GHSA-g549-r73g-x7x6, UBUNTU-CVE-2026-102504

## 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.

Weakness: CWE-789 (Memory Allocation with Excessive Size Value), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-102504?

It affects 1 product.


Products: Tonycoz Imager.

## How do I fix CVE-2026-102504?

Upgrade to a fixed version.

## 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

- [CVE-2026-14454](https://insights.sbomify.com/CVE-2026-14454/): Imager versions before 1.033 for Perl treat unsigned EXIF IFD entry counts as signed (critical 9.8)
- [CVE-2026-102505](https://insights.sbomify.com/CVE-2026-102505/): Memory corruption in tonycoz:imager (medium 6.3)
- [CVE-2024-53901](https://insights.sbomify.com/CVE-2024-53901/): Memory corruption in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-102504 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-102504 in the wild and no public exploit code.

Affected product: tonycoz:imager. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-102504/ (Markdown: https://insights.sbomify.com/CVE-2026-102504/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-102504
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102504
- OSV: https://osv.dev/vulnerability/CVE-2026-102504

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-102504/
Summaries are generated and may contain mistakes; the official description above is the record.