CVE-2026-97692
- Source
- https://cve.org/CVERecord?id=CVE-2026-97692
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97692.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-97692
- Aliases
-
- GHSA-gr74-333w-7wg8
- Published
- 2026-11-13T18:42:41Z
- Modified
- 2026-11-14T10:45:16Z
- Severity
-
- 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H CVSS Calculator
- Summary
- BACnet Stack: pre-auth out-of-bounds read that escalates to an out-of-bounds write into global memory
- Details
-
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.6, 1.5.2, and 1.6.1, the BACnet/SC message decoder walks the header-option list by following each option's MORE bit. Nothing rejects a list whose last option still has the MORE bit set, and the decode walk has no upper bound on how many options it processes. A single crafted BVLC-SC frame makes the walk advance one option past the end of the message and read message[message_len], one byte out of bounds. When the bytes after the message carry more MORE-set option markers, the walk keeps going: it runs past the fixed 4-entry option array and writes decoded option fields out of bounds. On the server that decode array is the static global bsc_dm, so the out-of-bounds write lands in adjacent BSS. Both faults are reachable before authentication, from the first frame a peer sends on a BACnet/SC connection, and the bytes that follow the message are the same peer's prior-frame data. This issue has been patched in versions 1.4.6, 1.5.2, 1.6.1, and 1.7.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-787" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97692.json" }- References
Affected packages
Git / github.com/bacnet-stack/bacnet-stack
Affected ranges
- Type
- GIT
- Repo
- https://github.com/bacnet-stack/bacnet-stack
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "1.4.6" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "1.5.0" }, { "fixed": "1.5.2" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "1.6.0" }, { "fixed": "1.6.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" } ] }