# CVE-2026-3381: Compress::Raw::Zlib versions through 2.219 for Perl use potentially insecure versions of zlib

CVE-2026-3381 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-3381, released March 5, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-3381
- Priority: Urgent
- CVSS: 9.8 (Critical)
- EPSS: 0.0062
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 5, 2026
- Weakness: Dependency on Vulnerable Third-Party Component
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3381

## Description

zlib 1.3.2: Add "Perl_crz" prefix to "z_errmsg". Fixes #32 * Fix spelling typo 2.219 23 February 2026 * Update to version 2.219 * zlib 1.3.2: Add a few casts to allow zlib sources to build with C++ * Test workflows with upstream zlib 1.32 * zlib 1.3.2: Add "Perl_crz_" prefix to exported symbols * zlib-1.3.2: Force include of <stddef.h> to get definition for NULL * Refresh zlib-src directory with unmodified zlib-1.3.2 files

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libcompress-raw-zlib-perl Debian 12.15 (bookworm) | 2.011-2 | [DEBIAN-CVE-2026-3381](https://patchblox.com/security/data/fix/linux/debian-cve-2026-3381.md) | Mar 5, 2026 |
| Linux | libcompress-raw-zlib-perl Debian 13.5 (trixie) | 2.011-2 | [DEBIAN-CVE-2026-3381](https://patchblox.com/security/data/fix/linux/debian-cve-2026-3381.md) | Mar 5, 2026 |
| Linux | libcompress-raw-zlib-perl Debian 14 | 2.011-2 | [DEBIAN-CVE-2026-3381](https://patchblox.com/security/data/fix/linux/debian-cve-2026-3381.md) | Mar 5, 2026 |
| Linux | perl-Compress-Raw-Zlib opensuse-leap 16.0 | 2.222-bp160.1.1 | [OPENSUSE-SU-2026:21142-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21142-1.md) | Jun 19, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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