# CVE-2026-93816: f2fs: validate inline dentry name lengths before conversion

CVE-2026-93816 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-93816, released September 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-93816
- Priority: High
- CVSS: 7.1 (Important)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 24, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93816

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: validate inline dentry name lengths before conversion  Inline dentry conversion copies names out of the inline dentry area before checking that each recorded name length fits in the available filename slots.  A corrupted image can therefore make the conversion path read past the inline filename storage while building the regular dentry block.  Validate each inline dentry name length against the inline filename area before copying it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.190-1 | [DEBIAN-CVE-2026-93816](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93816.md) | Sep 24, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.111-1 | [DEBIAN-CVE-2026-93816](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93816.md) | Sep 24, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-93816](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93816.md) | Sep 24, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.111-1~deb12u1 | [DEBIAN-CVE-2026-93816](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93816.md) | Sep 24, 2026 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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