VulnerabilityAnalyzed
CVE-2025-50343
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.
CRITICAL 9.8EPSS 0.40%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122
- Affected
- matio project/matio
- Source
- cve@mitre.org
References
- https://github.com/tbeu/matio/issues/275Exploit, Issue Tracking, Third Party Advisory
- https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.mdExploit, Third Party Advisory
- https://github.com/tbeu/matio/issues/275Exploit, Issue Tracking, Third Party Advisory
- https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.mdExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.