# OSV-2021-1595: UNKNOWN WRITE in sprint_realloc_hinted_integer

> A memory corruption vulnerability in integer formatting functions allows attackers to cause crashes or potentially execute arbitrary code.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Not stated
- **Victim action needed:** Not stated
- **Fix available:** No
- **Published:** 21 Nov 2021

## What is OSV-2021-1595?

OSV-2021-1595 is a memory corruption vulnerability in net-snmp, published on 21 Nov 2021. 

### Official description

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=41205

```
Crash type: UNKNOWN WRITE
Crash state:
sprint_realloc_hinted_integer
sprint_realloc_integer
snprint_integer
```

## Which versions are affected by OSV-2021-1595?

1 open source package ship an affected version, including net-snmp.


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

## How do I fix OSV-2021-1595?

No fix has been published for OSV-2021-1595 yet. Limit exposure of the affected software until one is available.

## Is OSV-2021-1595 being exploited?

There is no known exploitation of OSV-2021-1595 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for OSV-2021-1595 and fix it if it is affected.

What it is: OSV-2021-1595 is a memory corruption vulnerability in net-snmp, published on 21 Nov 2021. 
Exploitation: There is no known exploitation of OSV-2021-1595 in the wild and no public exploit code.

Affected packages and fixed versions:
- net-snmp (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-2021-1595/ (Markdown: https://insights.sbomify.com/OSV-2021-1595/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/OSV-2021-1595

---
From sbomify Insights: https://insights.sbomify.com/OSV-2021-1595/
Summaries are generated and may contain mistakes; the official description above is the record.