Withdrawn: this CVE is not a vulnerability
The assigning CNA withdrew CVE-2025-50343 on 21 October 2026, and it carries the Rejected state at CVE.org and NVD. It must not be treated as a live finding. Its pre-withdrawal severity, score and exploitability are withheld below; the record itself is kept because withdrawals are reversible and because the reject reason is the correction worth publishing.
WITHDRAWN
CVE-2025-50343
Matio Heap-Based Memory Corruption Vulnerability
Overview
Description
Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none.
Details
INFO
Published Date :
Dec. 30, 2025, 8:16 p.m.
Last Modified :
Oct. 21, 2026, 5:17 p.m.
Remotely Exploit :
—
Source :
[email protected]
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-50343 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-50343 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Rejected by [email protected]
Oct. 21, 2026
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 21, 2026
Action Type Old Value New Value Removed SSVC {'id': 'CVE-2025-50343', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-01-02T15:59:53.648727Z'} Removed Tag MITRE: disputed Changed 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. NOTE: Multiple third-parties note that the available evidence does not demonstrate a vulnerability exploitable through an attacker-controlled input path. Rejected reason: DO NOT USE THIS CVE RECORD. ConsultIDs: none. Reason: This record was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none. Removed CVSS V3.1 CISA-ADP: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Removed CWE CISA-ADP: CWE-122 Removed CPE Configuration OR *cpe:2.3:a:matio_project:matio:1.5.28:*:*:*:*:*:*:* Added Affected Affected value removed. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/50xxx/CVE-2025-50343.json">CVE-2025-50343</a> Removed Reference MITRE: https://github.com/tbeu/matio/issues/275 Removed Reference MITRE: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference CISA-ADP: https://github.com/tbeu/matio/issues/275 Removed Reference CISA-ADP: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference Type MITRE: https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Removed Reference Type MITRE: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory Removed Reference Type CISA-ADP: https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Removed Reference Type CISA-ADP: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 30, 2026
Action Type Old Value New Value Added Reference https://github.com/tbeu/matio/issues/275 Added Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference https://github.com/tbeu/matio/issues/275 Removed Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference Type https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Removed Reference Type https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory -
CVE Modified by [email protected]
Sep. 30, 2026
Action Type Old Value New Value Added Tag disputed Changed 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. 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. NOTE: Multiple third-parties note that the available evidence does not demonstrate a vulnerability exploitable through an attacker-controlled input path. Added Reference https://github.com/tbeu/matio/issues/275 Added Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference https://github.com/tbeu/matio/issues/275 Removed Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Removed Reference Type https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Removed Reference Type https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-50343', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-01-02T15:59:53.648727Z'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'n/a', 'versions': [{'status': 'affected', 'version': 'n/a'}]}] -
Initial Analysis by [email protected]
Jan. 09, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:matio_project:matio:1.5.28:*:*:*:*:*:*:* Added Reference Type MITRE: https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Added Reference Type MITRE: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://github.com/tbeu/matio/issues/275 Types: Exploit, Issue Tracking, Third Party Advisory Added Reference Type CISA-ADP: https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-122 Added Reference https://github.com/tbeu/matio/issues/275 Added Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md -
New CVE Received by [email protected]
Dec. 30, 2025
Action Type Old Value New Value Added 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. Added Reference https://github.com/tbeu/matio/issues/275 Added Reference https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.