CVE-2025-40928 | JSON::XS before version 4.04 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact

JSON::XS before version 4.04 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact

Published: 2025-09-08 Last update: 2026-04-15 Assigner: 9b29abf9-4ab0-4765-b253-1875cd9b441e Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-40928 is rated Moderate Risk (44.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2025-40928

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 2026-05-25 0.05% 0.19% +0.14%
2 2025-09-09 — 0.05% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-40928

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-40928

OS Trackers for CVE-2025-40928

vendor priority summary link
debian not yet assigned CVE-2025-40928 not yet assigned priority: Debian including 1 source packages (libjson-xs-perl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-40928
redhat medium — https://access.redhat.com/security/cve/CVE-2025-40928
suse high CVE-2025-40928 severity important: SUSE including 5 source package names (perl-Cpanel-JSON-XS-4.37-bp156.2.3.1, perl-JSON-XS-3.04-4.el8_10, perl-JSON-XS-4.04-1.el9_6, perl-JSON-XS-4.40.0-1.1, perl-JSON-XS-4.40.0-bp156.3.3.1), 7 product×package rows across 5 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9, … (5 product lines)): Fixed 7. https://www.suse.com/security/cve/CVE-2025-40928/
ubuntu medium CVE-2025-40928 medium priority: Ubuntu including 1 source packages (libjson-xs-perl), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): released 5, needs-triage 4. https://ubuntu.com/security/CVE-2025-40928

Affected software / configurations for CVE-2025-40928

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-40928

cvelogic Threat Intelligence