# CVE-2025-4056: Glib: glib crash after long command line

> An attacker can cause a denial of service in applications using GLib on Windows by triggering a crash with long command lines.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** Yes
- **Published:** 28 Jul 2025
- **Updated:** 30 Jun 2026
- **Also known as:** GHSA-6gjq-8hm4-wjmq, JLSEC-2025-168, MINI-mcvj-9m67-gw3r, OESA-2025-1551

## What is CVE-2025-4056?

CVE-2025-4056 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 28 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in GLib. A denial of service on Windows platforms may occur if an application attempts to spawn a program using long command lines.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2025-4056?

It affects 1 product.


Products: Gnome Glib.

## How do I fix CVE-2025-4056?

Apply the vendor's patch.

## Is CVE-2025-4056 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-4056 exists.

## Other vulnerabilities in Red Hat Enterprise Linux 10

- [CVE-2020-35457](https://insights.sbomify.com/CVE-2020-35457/): Integer overflow in n/a (high 7.8)
- [CVE-2009-3289](https://insights.sbomify.com/CVE-2009-3289/): Privilege escalation in n/a (high 7.8)
- [CVE-2025-13601](https://insights.sbomify.com/CVE-2025-13601/): Glib: integer overflow in in g_escape_uri_string() (high 7.7)
- [CVE-2026-58016](https://insights.sbomify.com/CVE-2026-58016/): Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml" (high 7.5)
- [CVE-2019-13012](https://insights.sbomify.com/CVE-2019-13012/): Misconfiguration in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4056 and fix it if it is affected.

What it is: CVE-2025-4056 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 28 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-4056 exists.

Affected product: Red Hat Enterprise Linux 10. 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-2025-4056/ (Markdown: https://insights.sbomify.com/CVE-2025-4056/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4056
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4056
- OSV: https://osv.dev/vulnerability/CVE-2025-4056

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-4056/
Summaries are generated and may contain mistakes; the official description above is the record.