# CVE-2026-23174: linux: In the Linux kernel, the following vulnerability has been resolved:  nvme-pci: handle changing device dma map require...

CVE-2026-23174 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23174 (version 6.18.10-1), released February 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23174
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 14, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  nvme-pci: handle changing device dma map requirements  The initial state of dma_needs_unmap may be false, but change to true while mapping the data iterator. Enabling swiotlb is one such case that can change the result. The nvme driver needs to save the mapped dma vectors to be unmapped later, so allocate as needed during iteration rather than assume it was always allocated at the beginning. This fixes a NULL dereference from accessing an uninitialized dma_vecs when the device dma unmapping requirements change mid-iteration.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.10-1 | [DEBIAN-CVE-2026-23174](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23174.md) | Feb 14, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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