CVE-2026-41990 — Libgcrypt before 1.12.2 mishandles Dilithium signing.
CVE-2026-41990 — Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data.
What This Means For You
- If your environment is affected by CWE-787, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-41990 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41990 Libgcrypt Dilithium Signing Out-of-Bounds Write Attempt
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41990 | vulnerability | CVE-2026-41990 |
| CWE-787 | weakness | CWE-787 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 23, 2026 at 08:16 UTC |
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