CVE-2025-50343

Exp

An issue was discovered in matio 1.5.28. A heap-based memory corruption can occur in Mat_VarCreateStruct() when the nfields value does not match the actual number of strings in the fields array. This leads to out-of-bounds reads and invalid memory frees during cleanup, potentially causing a segmentation fault or heap corruption.

Published: 2025-12-30 Last update: 2026-01-09 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-50343 is rated High Exploit Risk (60.7/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.06%). 2 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-2025-50343

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

Exploit prediction scoring system (EPSS) score for CVE-2025-50343

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 2026-01-18 0.05% 0.06% +0.01%
2 2026-01-10 0.06% 0.05% -0.01%
3 2026-01-05 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-50343

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-50343

OS Trackers for CVE-2025-50343

vendor priority summary link
debian not yet assigned CVE-2025-50343 not yet assigned priority: Debian including 1 source packages (libmatio), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2025-50343
redhat — — https://access.redhat.com/security/cve/CVE-2025-50343
ubuntu medium CVE-2025-50343 medium priority: Ubuntu including 1 source packages (libmatio), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): deferred 7, ignored 1, needed 1. https://ubuntu.com/security/CVE-2025-50343

Affected software / configurations for CVE-2025-50343

Vendor Product Version Raw CPE
matio_project matio 1.5.28 cpe:2.3:a:matio_project:matio:1.5.28:*:*:*:*:*:*:*

References for CVE-2025-50343

URL Tags
https://github.com/tbeu/matio/issues/275 Exploit Issue Tracking Third Party Advisory
https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Exploit Third Party Advisory
cvelogic Threat Intelligence