# CVE-2023-40745: Libtiff: integer overflow in tiffcp.c

> Remote attackers can cause denial of service or execute arbitrary code via crafted TIFF images due to an integer overflow in LibTIFF.

- **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:** 5 Oct 2023
- **Updated:** 22 Jan 2026
- **Also known as:** AZL-31096, BELL-CVE-2023-40745, DEBIAN-CVE-2023-40745, GHSA-w737-xjxg-h9mw, JLSEC-2025-312

## What is CVE-2023-40745?

CVE-2023-40745 is a medium-severity vulnerability in Fedoraproject Fedora, published on 5 Oct 2023. 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

LibTIFF is vulnerable to an integer overflow. This flaw allows remote attackers to cause a denial of service (application crash) or possibly execute an arbitrary code via a crafted tiff image, which triggers a heap-based buffer overflow.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2023-40745?

It affects 4 products.


Products: Fedoraproject Fedora, Libtiff Libtiff, Netapp Active Iq Unified Manager, Redhat Enterprise Linux.

## How do I fix CVE-2023-40745?

Apply the vendor's patch.

## Is CVE-2023-40745 being exploited?

There is no known exploitation of CVE-2023-40745 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40745 and fix it if it is affected.

What it is: CVE-2023-40745 is a medium-severity vulnerability in Fedoraproject Fedora, published on 5 Oct 2023. 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-2023-40745 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2023-40745/ (Markdown: https://insights.sbomify.com/CVE-2023-40745/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40745
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40745
- OSV: https://osv.dev/vulnerability/CVE-2023-40745

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-40745/
Summaries are generated and may contain mistakes; the official description above is the record.