# CVE-2025-43964: Integer overflow in LibRaw

> LibRaw fails to validate minimum width values during tag processing, potentially causing a denial of service via crafted raw images.

- **Severity:** Low 2.9 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Apr 2025
- **Updated:** 3 Nov 2025
- **Also known as:** AZL-61756, DEBIAN-CVE-2025-43964, GHSA-3cxc-phxh-65vq, JLSEC-2026-1112, UBUNTU-CVE-2025-43964

## What is CVE-2025-43964?

CVE-2025-43964 is a low-severity vulnerability in Libraw Libraw, published on 20 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In LibRaw before 0.21.4, tag 0x412 processing in phase_one_correct in decoders/load_mfbacks.cpp does not enforce minimum w0 and w1 values.

Weakness: CWE-1284 (Improper Validation of Specified Quantity in Input)

## Which versions are affected by CVE-2025-43964?

It affects 1 product.


Products: Libraw Libraw.

## How do I fix CVE-2025-43964?

Upgrade to a fixed version.

## Is CVE-2025-43964 being exploited?

There is no known exploitation of CVE-2025-43964 in the wild and no public exploit code.

## Other vulnerabilities in Libraw Libraw

- [CVE-2026-20889](https://insights.sbomify.com/CVE-2026-20889/): Memory corruption in LibRaw (critical 9.8)
- [CVE-2026-20911](https://insights.sbomify.com/CVE-2026-20911/): Memory corruption in LibRaw (critical 9.8)
- [CVE-2026-21413](https://insights.sbomify.com/CVE-2026-21413/): Memory corruption in LibRaw (critical 9.8)
- [CVE-2015-8366](https://insights.sbomify.com/CVE-2015-8366/): Integer overflow in n/a (critical 9.8)
- [CVE-2015-8367](https://insights.sbomify.com/CVE-2015-8367/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-43964 and fix it if it is affected.

What it is: CVE-2025-43964 is a low-severity vulnerability in Libraw Libraw, published on 20 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-43964 in the wild and no public exploit code.

Affected product: Libraw Libraw. 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-2025-43964/ (Markdown: https://insights.sbomify.com/CVE-2025-43964/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-43964
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-43964
- OSV: https://osv.dev/vulnerability/CVE-2025-43964

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-43964/
Summaries are generated and may contain mistakes; the official description above is the record.