Gnupg
CVE-2025-30258
LOW
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Unusual condition handling
|
| Impact | CVSS score of 2.7 (LOW). Attack characteristics: local attack vector, high complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.03%. |
| Exploit ScenarioDerived | Successful exploitation could compromise the low-severity affected system. |
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Alert meAnalysisAIv1 – Mar 28, 2026
In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify. Rated low severity (CVSS 2.7), this vulnerability is no authentication required. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-754. In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a "verification DoS." Affected products include: Gnupg. Version information: before 2.5.5.
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Severity by source
AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a "verification DoS."
Executive ViewAI
CVE-2025-30258 is a low-severity vulnerability in GnuPG (CVSS 2.7). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation. Apply vendor updates when available as part of routine maintenance.
Apply vendor patch during routine maintenance. Standard security controls provide adequate interim protection.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)CVE.org
Remote code execution and denial of service in GnuPG before 2.5.17 stem from a stack-based buffer overflow in gpg-agent
GnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that can result in At
cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, whic
Stack-based buffer overflow in GnuPG's tpm2daemon (versions before 2.5.17) allows a local attacker to corrupt the daemon
GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other imp
Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes i
GnuPG through 2.3.6, in unusual situations where an attacker possesses any secret-key information from a victim's keyrin
The read_block function in g10/import.c in GnuPG 1.4.x before 1.4.13 and 2.0.x through 2.0.19, when importing a key, all
The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two c
Code execution in a victim user's context is possible on Windows hosts running GnuPG 2.5.21 because default DACL inherit
Libksba before 1.6.3 is prone to an integer overflow vulnerability in the CRL signature parser. Rated critical severity
Integer underflow in the ksba_oid_to_str function in Libksba before 1.3.2, as used in GnuPG, allows remote attackers to
GitHub PoC
Exploit-DB