# CVE-2026-87875: Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound

CVE-2026-87875 is fixed in 15 products on 1 platform, first by OPENSUSE-SU-2026:21893-1, released September 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-87875
- Priority: Routine
- CVSS: 4.3 (Moderate)
- EPSS: 0.0039
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2026
- Weakness: Out-of-bounds Read
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87875

## Description

This update for cups fixes the following issue:  - CVE-2026-87875,GHSA-559w-7676-3xrq: heap out-of-bounds read in `cupsUTF32ToUTF8()` due to missing source-length bound   can be reached via the SNMP supply-description parsing (bsc#1279945).

## 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 opensuse-leap 16.0 | 2.4.19-160000.2.1 | [OPENSUSE-SU-2026:21893-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21893-1.md) | Sep 20, 2026 |
| Linux | cups sles 15.7 | 2.2.7-150000.3.96.1 | [SUSE-SU-2026:4281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4281-1.md) | Sep 22, 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 2026-11-10T07:50:38Z 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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