libmatio: An issue was discovered in matio 1.5.28
CVE-2025-50343 is fixed in libmatio on 1 platform, first by DEBIAN-CVE-2025-50343, released December 30, 2025. It is not reported as exploited. Patch Radar priority: Urgent.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmatio · Debian 12.15 (bookworm) | 1.5.23-2+deb12u1 | DEBIAN-CVE-2025-50343 | Dec 30, 2025 |
| libmatio · Debian 14 | 1.5.30-2 | DEBIAN-CVE-2025-50343 | Dec 30, 2025 |
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