# CVE-2026-23109: linux: In the Linux kernel, the following vulnerability has been resolved:  fs/writeback: skip AS_NO_DATA_INTEGRITY mappings...

CVE-2026-23109 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23109 (version 6.18.8-1), released February 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23109
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 4, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()  Above the while() loop in wait_sb_inodes(), we document that we must wait for all pages under writeback for data integrity.  Consequently, if a mapping, like fuse, traditionally does not have data integrity semantics, there is no need to wait at all; we can simply skip these inodes.  This restores fuse back to prior behavior where syncs are no-ops.  This fixes a user regression where if a system is running a faulty fuse server that does not reply to issued write requests, this causes wait_sb_inodes() to wait forever.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.8-1 | [DEBIAN-CVE-2026-23109](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23109.md) | Feb 4, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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