# CVE-2023-45853: minizip: MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_...

CVE-2023-45853 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2023-45853, released October 14, 2023. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-45853
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0345
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 14, 2023

## Description

MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. NOTE: MiniZip is not a supported part of the zlib product. NOTE: pyminizip through 0.2.6 is also vulnerable because it bundles an affected zlib version, and exposes the applicable MiniZip code through its compress API.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | minizip Debian 12.15 (bookworm) | 1.1-8+deb12u1 | [DEBIAN-CVE-2023-45853](https://patchblox.com/security/data/fix/linux/debian-cve-2023-45853.md) | Oct 14, 2023 |
| Linux | minizip-compat amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | minizip-compat-debuginfo amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | minizip-compat-devel amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | zlib Debian 13.5 (trixie) | 1:1.3.dfsg-2 | [DEBIAN-CVE-2023-45853](https://patchblox.com/security/data/fix/linux/debian-cve-2023-45853.md) | Oct 14, 2023 |
| Linux | zlib Debian 14 | 1:1.3.dfsg-2 | [DEBIAN-CVE-2023-45853](https://patchblox.com/security/data/fix/linux/debian-cve-2023-45853.md) | Oct 14, 2023 |
| Linux | zlib amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | zlib opensuse-leap 16.0 | 1.2.13-160000.3.1 | [OPENSUSE-SU-2026:20487-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20487-1.md) | Apr 9, 2026 |
| Linux | zlib sles 16.0 | 1.2.13-160000.3.1 | [SUSE-SU-2026:21151-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21151-1.md) | Apr 9, 2026 |
| Linux | zlib-debuginfo amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | zlib-debugsource amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | zlib-devel amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |
| Linux | zlib-static amzn 2023 | 1.2.11-33.amzn2023.0.5 | [ALAS2023-2023-410](https://patchblox.com/security/data/fix/linux/alas2023-2023-410.md) | Oct 30, 2023 |

---

Data as of 2026-11-08T00:53:09Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.