# GHSA-x77x-7mmh-cxv3: Uninitialized memory exposure in string reading functions

> Attackers can read uninitialized memory containing sensitive data via string reading functions in the unmaintained ncurses-rs 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:** 21 Oct 2025
- **Also known as:** RUSTSEC-2025-0108

## What is GHSA-x77x-7mmh-cxv3?

GHSA-x77x-7mmh-cxv3 is a vulnerability in ncurses, published on 21 Oct 2025. 

### Official description

Multiple string reading functions expose uninitialized memory by setting length to capacity when no null terminator is found.

This allows reading uninitialized memory which may contain sensitive data from previous allocations.

The ncurses-rs repository is archived and unmaintained.

## Which versions are affected by GHSA-x77x-7mmh-cxv3?

3 open source packages ship an affected version, including ncurses.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ncurses` | crates.io | All versions to 6.0.1 | None |
| `ncurses` | crates.io | All versions to 6.0.1 | None |
| `ncurses` | crates.io | From 0.0.0-0 | None |

## How do I fix GHSA-x77x-7mmh-cxv3?

No fix has been published for GHSA-x77x-7mmh-cxv3 yet. Limit exposure of the affected software until one is available.

## Is GHSA-x77x-7mmh-cxv3 being exploited?

There is no known exploitation of GHSA-x77x-7mmh-cxv3 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-x77x-7mmh-cxv3 and fix it if it is affected.

What it is: GHSA-x77x-7mmh-cxv3 is a vulnerability in ncurses, published on 21 Oct 2025. 
Exploitation: There is no known exploitation of GHSA-x77x-7mmh-cxv3 in the wild and no public exploit code.

Affected packages and fixed versions:
- ncurses (crates.io): affected all versions up to 6.0.1; no fix listed
- ncurses (crates.io): affected all versions up to 6.0.1; no fix listed
- ncurses (crates.io): affected from 0.0.0-0; 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/GHSA-x77x-7mmh-cxv3/ (Markdown: https://insights.sbomify.com/GHSA-x77x-7mmh-cxv3/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-x77x-7mmh-cxv3

---
From sbomify Insights: https://insights.sbomify.com/GHSA-x77x-7mmh-cxv3/
Summaries are generated and may contain mistakes; the official description above is the record.