# CVE-2026-23019: linux: In the Linux kernel, the following vulnerability has been resolved:  net: marvell: prestera: fix NULL dereference on...

CVE-2026-23019 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-23019, released January 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23019
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 31, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: marvell: prestera: fix NULL dereference on devlink_alloc() failure  devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer.  This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.162-1 | [DEBIAN-CVE-2026-23019](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23019.md) | Jan 31, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.69-1 | [DEBIAN-CVE-2026-23019](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23019.md) | Jan 31, 2026 |
| Linux | linux Debian 14 | 6.18.8-1 | [DEBIAN-CVE-2026-23019](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23019.md) | Jan 31, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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