CVE-2025-50343
CWE-122Published: December 30, 2025· Updated: Jun 17, 2026
Official Description
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.
Risk Analysis
Matio 1.5.28 contains a heap-based memory corruption vulnerability triggered by improper handling of field counts in Mat_VarCreateStruct(). This critical flaw can lead to application crashes or potential memory corruption, earning a 9.8 CVSS score.
There is no known public exploit for this issue, and it is not currently in CISA KEV.
Upgrade to a version of matio that addresses this memory management flaw.
Technical Analysis
CVE-2025-50343 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-122)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-50343 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts