# CVE-2026-31753: linux: In the Linux kernel, the following vulnerability has been resolved:  auxdisplay: line-display: fix NULL dereference i...

CVE-2026-31753 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31753 (version 6.19.12-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-31753
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  auxdisplay: line-display: fix NULL dereference in linedisp_release  linedisp_release() currently retrieves the enclosing struct linedisp via to_linedisp(). That lookup depends on the attachment list, but the attachment may already have been removed before put_device() invokes the release callback. This can happen in linedisp_unregister(), and can also be reached from some linedisp_register() error paths.  In that case, to_linedisp() returns NULL and linedisp_release() dereferences it while freeing the display resources.  The struct device released here is the embedded linedisp->dev used by linedisp_register(), so retrieve the enclosing object directly with container_of() instead.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.12-1 | [DEBIAN-CVE-2026-31753](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31753.md) | May 15, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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