# CVE-2025-64503: libcupsfilters-tests: cups-filters contains backends, filters, and other software required to getthe cups printing service working on opera...

CVE-2025-64503 is fixed in 14 products on 1 platform, first by libcupsfilters-tests 2.0.0-0ubuntu7.2, released November 11, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-64503
- Priority: Routine
- CVSS: 3.3 (Medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 11, 2025

## Description

cups-filters contains backends, filters, and other software required to getthe cups printing service working on operating systems other than macos. Incups-filters prior to 1.28.18, by crafting a PDF file with a large`MediaBox` value, an attacker can cause CUPS-Filter 1.x’s `pdftoraster`tool to write beyond the bounds of an array. First, a PDF with a large`MediaBox` width value causes `header.cupsWidth` to become large.  Next,the calculation of `bytesPerLine = (header.cupsBitsPerPixel *header.cupsWidth + 7) / 8` overflows, resulting in a small value. Then,`lineBuf` is allocated with the small `bytesPerLine` size. Finally,`convertLineChunked` calls `writePixel8`, which attempts to write to`lineBuf` outside of its buffer size (out of bounds write). Inlibcupsfilters, the maintainers found the same `bytesPerLine`multiplication without overflow check, but the provided test case does notcause an overflow there, because the values are different. Commit50d94ca0f2fa6177613c97c59791bde568631865 contains a patch, which isincorporated into cups-filters version 1.28.18.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cups-browsed Ubuntu 18.04.6 LTS (bionic) | 1.20.2-0ubuntu3.3+esm2 | [cups-browsed 1.20.2-0ubuntu3.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-cups-browsed-1.20.2-0ubuntu3.3-esm2.md) | Nov 20, 2025 |
| Linux | cups-browsed Ubuntu 20.04 LTS (focal) | 1.27.4-1ubuntu0.4+esm1 | [cups-browsed 1.27.4-1ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-cups-browsed-1.27.4-1ubuntu0.4-esm1.md) | Nov 20, 2025 |
| Linux | cups-browsed Ubuntu 22.04.1 LTS (jammy) | 1.28.15-0ubuntu1.5 | [cups-browsed 1.28.15-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-cups-browsed-1.28.15-0ubuntu1.5.md) | Nov 20, 2025 |
| Linux | cups-filters Debian 12.15 (bookworm) | 1.28.17-3+deb12u2 | [DEBIAN-CVE-2025-64503](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64503.md) | Nov 12, 2025 |
| Linux | cups-filters Debian 13.5 (trixie) | 1.28.17-6+deb13u1 | [DEBIAN-CVE-2025-64503](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64503.md) | Nov 12, 2025 |
| Linux | cups-filters Debian 14 | 1.28.17-7 | [DEBIAN-CVE-2025-64503](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64503.md) | Nov 12, 2025 |
| Linux | cups-filters Ubuntu 18.04.6 LTS (bionic) | 1.20.2-0ubuntu3.3+esm2 | [cups-filters 1.20.2-0ubuntu3.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-cups-filters-1.20.2-0ubuntu3.3-esm2.md) | Nov 20, 2025 |
| Linux | cups-filters Ubuntu 20.04 LTS (focal) | 1.27.4-1ubuntu0.4+esm1 | [cups-filters 1.27.4-1ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-cups-filters-1.27.4-1ubuntu0.4-esm1.md) | Nov 20, 2025 |
| Linux | cups-filters Ubuntu 22.04.1 LTS (jammy) | 1.28.15-0ubuntu1.5 | [cups-filters 1.28.15-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-cups-filters-1.28.15-0ubuntu1.5.md) | Nov 20, 2025 |
| Linux | cups-filters amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | cups-filters opensuse-leap 15.6 | 1.25.0-150200.3.25.1 | [SUSE-SU-2025:4158-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4158-1.md) | Nov 21, 2025 |
| Linux | cups-filters sles 15.6 | 1.25.0-150200.3.25.1 | [SUSE-SU-2025:4158-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4158-1.md) | Nov 21, 2025 |
| Linux | cups-filters sles 15.7 | 1.25.0-150200.3.25.1 | [SUSE-SU-2025:4158-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4158-1.md) | Nov 21, 2025 |
| Linux | cups-filters-core-drivers Ubuntu 18.04.6 LTS (bionic) | 1.20.2-0ubuntu3.3+esm2 | [cups-filters-core-drivers 1.20.2-0ubuntu3.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-cups-filters-core-drivers-1.20.2-0ubuntu3.3-esm2.md) | Nov 20, 2025 |
| Linux | cups-filters-core-drivers Ubuntu 20.04 LTS (focal) | 1.27.4-1ubuntu0.4+esm1 | [cups-filters-core-drivers 1.27.4-1ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-cups-filters-core-drivers-1.27.4-1ubuntu0.4-esm1.md) | Nov 20, 2025 |
| Linux | cups-filters-core-drivers Ubuntu 22.04.1 LTS (jammy) | 1.28.15-0ubuntu1.5 | [cups-filters-core-drivers 1.28.15-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-cups-filters-core-drivers-1.28.15-0ubuntu1.5.md) | Nov 20, 2025 |
| Linux | cups-filters-debuginfo amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | cups-filters-debugsource amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | cups-filters-devel amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | cups-filters-libs amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | cups-filters-libs-debuginfo amzn 2023 | 1.28.16-3.amzn2023.0.5 | [ALAS2023-2025-1291](https://patchblox.com/security/data/fix/linux/alas2023-2025-1291.md) | Dec 8, 2025 |
| Linux | libcupsfilters Debian 13.5 (trixie) | 2.0.0-3+deb13u1 | [DEBIAN-CVE-2025-64503](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64503.md) | Nov 12, 2025 |
| Linux | libcupsfilters Debian 14 | 2.1.1-2 | [DEBIAN-CVE-2025-64503](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64503.md) | Nov 12, 2025 |
| Linux | libcupsfilters-tests Ubuntu 24.04.5 LTS (noble) | 2.0.0-0ubuntu7.2 | [libcupsfilters-tests 2.0.0-0ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcupsfilters-tests-2.0.0-0ubuntu7.2.md) | Nov 11, 2025 |
| Linux | libcupsfilters-tests Ubuntu 25.04 (plucky) | 2.1.1-0ubuntu2.1 | [libcupsfilters-tests 2.1.1-0ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libcupsfilters-tests-2.1.1-0ubuntu2.1.md) | Nov 12, 2025 |
| Linux | libcupsfilters-tests Ubuntu 25.10 (questing) | 2.1.1-0ubuntu3.1 | [libcupsfilters-tests 2.1.1-0ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcupsfilters-tests-2.1.1-0ubuntu3.1.md) | Nov 11, 2025 |
| Linux | libcupsfilters1 Ubuntu 18.04.6 LTS (bionic) | 1.20.2-0ubuntu3.3+esm2 | [libcupsfilters1 1.20.2-0ubuntu3.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcupsfilters1-1.20.2-0ubuntu3.3-esm2.md) | Nov 20, 2025 |
| Linux | libcupsfilters1 Ubuntu 20.04 LTS (focal) | 1.27.4-1ubuntu0.4+esm1 | [libcupsfilters1 1.27.4-1ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libcupsfilters1-1.27.4-1ubuntu0.4-esm1.md) | Nov 20, 2025 |
| Linux | libcupsfilters1 Ubuntu 22.04.1 LTS (jammy) | 1.28.15-0ubuntu1.5 | [libcupsfilters1 1.28.15-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcupsfilters1-1.28.15-0ubuntu1.5.md) | Nov 20, 2025 |
| Linux | libcupsfilters2-common Ubuntu 24.04.5 LTS (noble) | 2.0.0-0ubuntu7.2 | [libcupsfilters2-common 2.0.0-0ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcupsfilters2-common-2.0.0-0ubuntu7.2.md) | Nov 11, 2025 |
| Linux | libcupsfilters2-common Ubuntu 25.04 (plucky) | 2.1.1-0ubuntu2.1 | [libcupsfilters2-common 2.1.1-0ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libcupsfilters2-common-2.1.1-0ubuntu2.1.md) | Nov 12, 2025 |
| Linux | libcupsfilters2-common Ubuntu 25.10 (questing) | 2.1.1-0ubuntu3.1 | [libcupsfilters2-common 2.1.1-0ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcupsfilters2-common-2.1.1-0ubuntu3.1.md) | Nov 11, 2025 |
| Linux | libcupsfilters2t64 Ubuntu 24.04.5 LTS (noble) | 2.0.0-0ubuntu7.2 | [libcupsfilters2t64 2.0.0-0ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcupsfilters2t64-2.0.0-0ubuntu7.2.md) | Nov 11, 2025 |
| Linux | libcupsfilters2t64 Ubuntu 25.04 (plucky) | 2.1.1-0ubuntu2.1 | [libcupsfilters2t64 2.1.1-0ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libcupsfilters2t64-2.1.1-0ubuntu2.1.md) | Nov 12, 2025 |
| Linux | libcupsfilters2t64 Ubuntu 25.10 (questing) | 2.1.1-0ubuntu3.1 | [libcupsfilters2t64 2.1.1-0ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcupsfilters2t64-2.1.1-0ubuntu3.1.md) | Nov 11, 2025 |
| Linux | libfontembed1 Ubuntu 18.04.6 LTS (bionic) | 1.20.2-0ubuntu3.3+esm2 | [libfontembed1 1.20.2-0ubuntu3.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libfontembed1-1.20.2-0ubuntu3.3-esm2.md) | Nov 20, 2025 |
| Linux | libfontembed1 Ubuntu 20.04 LTS (focal) | 1.27.4-1ubuntu0.4+esm1 | [libfontembed1 1.27.4-1ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libfontembed1-1.27.4-1ubuntu0.4-esm1.md) | Nov 20, 2025 |
| Linux | libfontembed1 Ubuntu 22.04.1 LTS (jammy) | 1.28.15-0ubuntu1.5 | [libfontembed1 1.28.15-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libfontembed1-1.28.15-0ubuntu1.5.md) | Nov 20, 2025 |

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