CVE-2025-30258

Exp

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."

Published: 2025-03-19 Last update: 2025-10-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-30258 is rated Exploit Available (50/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.05%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-30258

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-30258

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-12 0.05% 0.05% +0.01%
2 2026-04-28 0.05% 0.05% -0.01%
3 2026-04-27 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-30258

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.7 3.1 LOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.0 1.4 [email protected]
4.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 3.6 [email protected]

Weakness enumeration for CVE-2025-30258

OS Trackers for CVE-2025-30258

vendor priority summary link
alpine — CVE-2025-30258: 1 source package rows (gnupg); 36 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 0, open 36. https://security.alpinelinux.org/vuln/CVE-2025-30258
debian not yet assigned CVE-2025-30258 not yet assigned priority: Debian including 1 source packages (gnupg2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2025-30258
redhat low — https://access.redhat.com/security/cve/CVE-2025-30258
suse low CVE-2025-30258 severity low: SUSE including 280 source package names (0.23.1-11.16:gpg2-2.4.4-150600.3.9.1, 0.3.2-1.2:gpg2-2.4.4-150600.3.9.1, …), 534 product×package rows across 264 product lines (Container bci/kiwi, Container bci/spack, … (264 product lines)): Fixed 294, Known Affected 231, Known Not Affected 9. https://www.suse.com/security/cve/CVE-2025-30258/
ubuntu medium CVE-2025-30258 medium priority: Ubuntu including 1 source packages (gnupg2), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): released 9. https://ubuntu.com/security/CVE-2025-30258

Affected software / configurations for CVE-2025-30258

Vendor Product Version Raw CPE
gnupg gnupg < 2.4.8 cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*
gnupg gnupg >= 2.5.0, < 2.5.5 cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*

References for CVE-2025-30258

cvelogic Threat Intelligence