# CVE-2019-1010025: Information disclosure in glibc

> Attackers can guess heap addresses of pthread-created threads, potentially bypassing ASLR mitigations in the GNU C Library.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Jul 2019
- **Updated:** 14 Oct 2026
- **Also known as:** DEBIAN-CVE-2019-1010025, GHSA-f8pw-hvh2-9x9f, MINI-29px-78xq-fj24, MINI-4hjr-3rw9-p262, MINI-x4vg-3rw6-7hv5

## What is CVE-2019-1010025?

CVE-2019-1010025 is a medium-severity vulnerability in Gnu Glibc, published on 15 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

GNU Libc current is affected by: Mitigation bypass. The impact is: Attacker may guess the heap addresses of pthread_created thread. The component is: glibc. NOTE: the vendor's position is "ASLR bypass itself is not a vulnerability.

Weakness: CWE-330 (Use of Insufficiently Random Values)

## Which versions are affected by CVE-2019-1010025?

It affects 1 product.


Products: Gnu Glibc.

## How do I fix CVE-2019-1010025?

No fix published yet.

## Is CVE-2019-1010025 being exploited?

There is no known exploitation of CVE-2019-1010025 in the wild and no public exploit code.

## Other vulnerabilities in Gnu Glibc

- [CVE-2026-5450](https://insights.sbomify.com/CVE-2026-5450/): scanf %mc off-by-one heap buffer overflow (critical 9.8)
- [CVE-2023-25139](https://insights.sbomify.com/CVE-2023-25139/): Memory corruption in n/a (critical 9.8)
- [CVE-1999-0199](https://insights.sbomify.com/CVE-1999-0199/): Other in n/a (critical 9.8)
- [CVE-2019-1010022](https://insights.sbomify.com/CVE-2019-1010022/): Security feature bypass in glibc (critical 9.8)
- [CVE-2005-3590](https://insights.sbomify.com/CVE-2005-3590/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1010025 and fix it if it is affected.

What it is: CVE-2019-1010025 is a medium-severity vulnerability in Gnu Glibc, published on 15 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-1010025 in the wild and no public exploit code.

Affected product: Gnu Glibc. 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-2019-1010025/ (Markdown: https://insights.sbomify.com/CVE-2019-1010025/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1010025
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1010025
- OSV: https://osv.dev/vulnerability/CVE-2019-1010025

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1010025/
Summaries are generated and may contain mistakes; the official description above is the record.