# CVE-2026-24883: Gpg4win: NULL Pointer Dereference

CVE-2026-24883 is fixed in 2 products on 2 platforms, first by Gpg4win 5.0.1, released January 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-24883
- Priority: Routine
- CVSS: 5.5
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 27, 2026
- Weakness: CWE-476: NULL Pointer Dereference
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-24883

## Description

In GnuPG before 2.5.17, a long signature packet length causes parse_signature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Gpg4win | 5.0.1 | [Gpg4win 5.0.1](https://patchblox.com/security/data/fix/windows-app/gnupg.gpg4win-5.0.1.md) | Jan 27, 2026 |
| Linux | gpg2 opensuse-leap 16.0 | 2.5.5-160000.4.1 | [OPENSUSE-SU-2026:20136-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20136-1.md) | Jan 29, 2026 |
| Linux | gpg2 sles 16.0 | 2.5.5-160000.4.1 | [SUSE-SU-2026:20195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20195-1.md) | Jan 29, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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