CVE-2026-113782 json
ESP-IDF: Stack-Based Out-of-Bounds Write in Thread Border Router ND6 Option Parsing
published 5d ago modified 9h ago also EUVD-2026-117048
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
ESP-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.2.0 until 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.3, the OpenThread Border Router Neighbor Discovery packet handler trusts an attacker-controlled ICMPv6 option length while copying into a fixed stack buffer. A host on the same infrastructure link as the Border Router can send a crafted ICMPv6 Router Advertisement to its infrastructure interface whose oversized length causes an out-of-bounds write into adjacent stack memory. Firmware is affected only when CONFIG_OPENTHREAD_BORDER_ROUTER=y; Thread end devices, routers, and RCP firmware without the Border Router feature are unaffected. Exploitation requires no authentication or user interaction and can crash or reboot the device or corrupt adjacent stack state. This issue is fixed in versions 5.2.8, 5.3.6, 5.5.5, and 6.0.3 and is scheduled to be fixed in version 5.4.5.
Patch / fix
Is CVE-2026-113782 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9h ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
Affected products
- espressif esp-idf
Classification
- Weakness
-
- CWE-121 Stack-based Buffer Overflow
References
- github.com /espressif/esp-idf/commit/4068c4e7d061b3e2d6096734509feadc14594e28
- github.com /espressif/esp-idf/commit/b6860b2db50406adf0aaebd75f2e9fe64cc805a9
- github.com /espressif/esp-idf/commit/c22480ba07fc1de454a63d42275c764d95c7bd9c
- github.com /espressif/esp-idf/commit/c828d0d709f1c46fa2b9e1ed3ce9d8dc4b29c42f
- github.com /espressif/esp-idf/commit/e18d27e480aec2b282898f4afc22b0f738ea7c04
- github.com /espressif/esp-idf/commit/f9bb1be59081ccef03a1b4b1fab9a225f28b1b61
- github.com /espressif/esp-idf/security/advisories/GHSA-c26h-gm53-qg83
Sources
- CVE List CVE-2026-113782
- NVD CVE-2026-113782
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.