# CVE-2023-39329: Openjpeg: resource exhaustion will occur in the opj_t1_decode_cblks function in the tcd.c

> Attackers can cause denial of service in applications using OpenJPEG by providing a crafted image file that triggers resource exhaustion.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 13 Jul 2024
- **Updated:** 21 Sep 2026
- **Also known as:** AZL-43495, AZL-44217, BELL-CVE-2023-39329, DEBIAN-CVE-2023-39329, ECHO-91bf-3d3c-aee7, GHSA-8g92-f59v-j999, JLSEC-2026-550, MINI-p496-562h-hg88, UBUNTU-CVE-2023-39329

## What is CVE-2023-39329?

CVE-2023-39329 is a medium-severity denial of service vulnerability in Uclouvain Openjpeg, published on 13 Jul 2024. 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 flaw was found in OpenJPEG. A resource exhaustion can occur in the opj_t1_decode_cblks function in tcd.c through a crafted image file, causing a denial of service.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2023-39329?

It affects 1 product.


Products: Uclouvain Openjpeg.

## How do I fix CVE-2023-39329?

Apply the vendor's patch.

## Is CVE-2023-39329 being exploited?

There is no known exploitation of CVE-2023-39329 in the wild and no public exploit code.

## Other vulnerabilities in Uclouvain Openjpeg

- [CVE-2013-4289](https://insights.sbomify.com/CVE-2013-4289/): Integer overflow in n/a (critical 10.0)
- [CVE-2013-4290](https://insights.sbomify.com/CVE-2013-4290/): Memory corruption in n/a (critical 10.0)
- [CVE-2012-3358](https://insights.sbomify.com/CVE-2012-3358/): Memory corruption in n/a (critical 10.0)
- [CVE-2018-7648](https://insights.sbomify.com/CVE-2018-7648/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-17479](https://insights.sbomify.com/CVE-2017-17479/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39329 and fix it if it is affected.

What it is: CVE-2023-39329 is a medium-severity denial of service vulnerability in Uclouvain Openjpeg, published on 13 Jul 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-39329 in the wild and no public exploit code.

Affected product: Uclouvain Openjpeg. 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-2023-39329/ (Markdown: https://insights.sbomify.com/CVE-2023-39329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39329
- OSV: https://osv.dev/vulnerability/CVE-2023-39329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39329/
Summaries are generated and may contain mistakes; the official description above is the record.