# OSV-2024-1266: UNKNOWN READ in llama_output_reserve

> An unknown read error in llama_output_reserve can cause a crash, potentially leading to denial of service for applications using the library.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Nov 2024

## What is OSV-2024-1266?

OSV-2024-1266 is a memory corruption vulnerability in llamacpp, published on 3 Nov 2024. 

### Official description

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=376770771

```
Crash type: UNKNOWN READ
Crash state:
llama_output_reserve
llama_decode
fuzz_tokenizer.cpp
```

## Which versions are affected by OSV-2024-1266?

1 open source package ship an affected version, including llamacpp.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `llamacpp` | OSS-Fuzz | All versions | None |

## How do I fix OSV-2024-1266?

No fix has been published for OSV-2024-1266 yet. Limit exposure of the affected software until one is available.

## Is OSV-2024-1266 being exploited?

There is no known exploitation of OSV-2024-1266 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for OSV-2024-1266 and fix it if it is affected.

What it is: OSV-2024-1266 is a memory corruption vulnerability in llamacpp, published on 3 Nov 2024. 
Exploitation: There is no known exploitation of OSV-2024-1266 in the wild and no public exploit code.

Affected packages and fixed versions:
- llamacpp (OSS-Fuzz): affected all versions; no fix listed

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/OSV-2024-1266/ (Markdown: https://insights.sbomify.com/OSV-2024-1266/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/OSV-2024-1266

---
From sbomify Insights: https://insights.sbomify.com/OSV-2024-1266/
Summaries are generated and may contain mistakes; the official description above is the record.