CVE-2026-41989: CWE-787 Out-of-bounds Write in gnupg Libgcrypt
Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.
AI Analysis
Technical Summary
CVE-2026-41989 is a heap-based buffer overflow vulnerability in Libgcrypt before version 1.12.2. It occurs when the gcry_pk_decrypt function processes crafted ECDH ciphertext, potentially causing memory corruption that can lead to denial of service and integrity impact. The vulnerability affects specific versions 1.8.8, 1.11.0, and 1.12.0. There is no vendor advisory or patch available at this time, and no known exploits have been reported in the wild.
Potential Impact
The vulnerability allows an attacker with local access (attack vector: local) and high attack complexity to cause a denial of service and compromise the integrity of the system by exploiting a heap-based buffer overflow in Libgcrypt. There is no confidentiality impact reported. The vulnerability does not require privileges or user interaction but has a limited attack vector (local).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid processing untrusted ECDH ciphertext with vulnerable versions of Libgcrypt. Monitor vendor channels for updates and apply patches promptly once available.
CVE-2026-41989: CWE-787 Out-of-bounds Write in gnupg Libgcrypt
Description
Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.
CVSS v3.1
Score 6.7medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-41989 is a heap-based buffer overflow vulnerability in Libgcrypt before version 1.12.2. It occurs when the gcry_pk_decrypt function processes crafted ECDH ciphertext, potentially causing memory corruption that can lead to denial of service and integrity impact. The vulnerability affects specific versions 1.8.8, 1.11.0, and 1.12.0. There is no vendor advisory or patch available at this time, and no known exploits have been reported in the wild.
Potential Impact
The vulnerability allows an attacker with local access (attack vector: local) and high attack complexity to cause a denial of service and compromise the integrity of the system by exploiting a heap-based buffer overflow in Libgcrypt. There is no confidentiality impact reported. The vulnerability does not require privileges or user interaction but has a limited attack vector (local).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid processing untrusted ECDH ciphertext with vulnerable versions of Libgcrypt. Monitor vendor channels for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-23T04:30:25.690Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e9a8be87115cfb68a6012f
Added to database: 04/23/2026, 05:06:06 UTC
Last enriched: 07/15/2026, 11:23:29 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 141
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