What’s Vulnerable › Vulnerabilities

CVE-2026-24883

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-27 · updated 2026-06-17
• Weakness: CWE-476

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).

Affected products

• GnuPG: from 2.5.13 before 2.5.17 — fixed in 2.5.17
• Gpg4Win: from 5.0.0 before 5.0.1 — fixed in 5.0.1

How to fix

Upgrade to a fixed version: GnuPG 2.5.17; Gpg4Win 5.0.1. Check the vendor advisory for mitigations.

References

• https://dev.gnupg.org/T8049
• https://www.openwall.com/lists/oss-security/2026/01/27/8

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