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Fencer Vulns
low 2.7

CVE-2025-30258 json

In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data...

published 2025-03-19 19 mo ago modified 2026-07-25 3 mo ago also EUVD-2025-6762 , JLSEC-2025-94

cvss
2.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

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."

Patch / fix

  • julia GnuPG_jll 2.4.8+0
  • GnuPG GnuPG 2.5.5
  • gnupg2 Debian 14, Debian 13 2.2.46-5

debian advisories DEBIAN-CVE-2025-30258

  • gnupg2 Ubuntu 20.04 LTS 2.2.19-3ubuntu2.4
  • gnupg2 Ubuntu 22.04 LTS 2.2.27-3ubuntu2.3
  • gnupg2 Ubuntu 24.04 LTS 2.4.4-2ubuntu17.2
  • gnupg2 Ubuntu 25.10 2.4.4-2ubuntu23
  • gnupg2 Ubuntu Pro 16.04 LTS 2.1.11-6ubuntu2.1+esm2
  • gnupg2 Ubuntu Pro 18.04 LTS 2.2.4-1ubuntu1.6+esm1

ubuntu advisories UBUNTU-CVE-2025-30258

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gpg2 SLE Micro 5.5, SLE Micro 5.4, SLE Micro 5.3 +1 more 2.2.27-150300.3.13.1
  • gpg2 SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.4.4-150600.3.9.1
  • gpg2 Linux Micro 6.1 2.4.4-slfo.1.1_5.1
  • gpg2 Linux Micro 6.0 2.4.4-5.1
  • gpg2 Linux Micro 6.1 2.4.4-slfo.1.1_4.1
  • gpg2 Linux Micro 6.1 2.4.4-slfo.1.1_3.1
  • gpg2 Linux Micro 6.0 2.4.4-4.1
  • gpg2 Linux Micro 6.1 2.4.4-slfo.1.1_2.1

suse advisories SUSE-SU-2025:3986-1SUSE-SU-2025:02259-1SUSE-SU-2025:20472-1SUSE-SU-2025:20465-1SUSE-RU-2025:20460-1SUSE-SU-2025:20458-1

  • gpg2 openSUSE Tumbleweed 2.5.6-1.1

opensuse advisories openSUSE-SU-2025:15076-1

  • gnupg2 Azure Linux 3.0 2.4.8-1

azure linux advisories AZL-58935

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-30258 updated cvss 2.7

gnupg: verification DoS due to a malicious subkey in the keyring

  • Red Hat Enterprise Linux 6 gnupg2, gnupg2-smime Red Hat Enterprise Linux 7 gnupg2, gnupg2-smime Red Hat Enterprise Linux 8 gnupg2, gnupg2-smime
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 gnupg2, gnupg2-smime Red Hat Enterprise Linux 10 gnupg2
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19 mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • dev.gnupg.org https://dev.gnupg.org/T7527 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 2.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
NVD 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia GnuPG_jll
<2.4.8+0
2.4.8+0

Affected products

  • GnuPG GnuPG

Classification

Weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.