CVE-2026-62976
BACnet Stack: Consecutive AtomicWriteFile(record-access) appends can trigger a heap out-of-bounds read in the RAMFS file backend
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to version 1.5.1, the RAMFS-backed FILE object implementation stores appended records as NUL-terminated strings, but its record-counting logic later walks the buffer as if an additional terminating empty record were present. As a result, two consecutive AtomicWriteFile(record-access) append requests can cause record_count() to call bacnet_strnlen() on a pointer that is already one byte past the end of the heap allocation. This issue has been patched in versions 1.5.1 and 1.6.0.
| CWE | CWE-125 |
| Vendor | bacnet-stack |
| Product | bacnet-stack |
| Published | Nov 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for bacnet-stack bacnet-stack
Be the first to know when new unknown vulnerabilities affecting bacnet-stack bacnet-stack are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
bacnet-stack / bacnet-stack
< 1.5.1