# CVE-2026-107888: OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.

CVE-2026-107888 is fixed in 15 products on 1 platform, first by ALAS2023-2026-3415, released November 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-107888
- Priority: Routine
- CVSS: 5.1 (Moderate)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 10, 2026
- Weakness: NULL Pointer Dereference
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-107888

## Description

OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Temporary-printer cleanup can remove the destination without canceling its held jobs, and the scheduler dereferences the NULL result of cupsdFindDest() while checking holding_new_jobs. This terminates cupsd and interrupts all queues managed by that process. In some plausible scenarios, an unprivileged submission can trigger this.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cups amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-client amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-client-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-debugsource amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-devel amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-filesystem amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-ipptool amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-ipptool-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-libs amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-libs-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-lpd amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-lpd-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-printerapp amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |
| Linux | cups-printerapp-debuginfo amzn 2023 | 1:2.4.20-1.amzn2023.0.1 | [ALAS2023-2026-3415](https://patchblox.com/security/data/fix/linux/alas2023-2026-3415.md) | Nov 10, 2026 |

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Data as of 2026-11-11T13:47:35Z 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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