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Esp IdfApplication · Espressif

CVE-2025-68473

HIGH · 8.6 CVSS v3.1 Published 2025-12-27
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.1, 5.4.3, 5.3.4, 5.2.6, 5.1.6, and earlier, in the ESP-IDF Bluetooth host stack (BlueDroid), the function bta_dm_sdp_result() used a fixed-size array uuid_list[32][MAX_UUID_SIZE] to store discovered service UUIDs during the SDP (Service Discovery Protocol) process. On modern Bluetooth devices, it is possible for the number of available services to exceed this fixed limit (32). In such cases, if more than 32 services are discovered, subsequent writes to uuid_list could exceed the bounds of the array, resulting in a potential out-of-bounds write condition.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-787

The program writes past the bounds of a buffer, overwriting adjacent memory an attacker can turn to their advantage. Crafted input can overwrite control data and redirect execution. Remediation is validating every index and length before a write, plus modern memory-safety mitigations.

General guidance for the out-of-bounds write class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Esp IdfApplication
Affected:= 5.1.6= 5.2.6= 5.3.4= 5.4.3= 5.5.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix Moderate confidence

ESP-IDF v5.5.2 or later stable release (after the fixed commit 3286e45349b0b5c2b1422ef7e8d088b95eef895d)

  1. 1. Identify the current ESP-IDF version in use by checking with 'idf.py --version' or reviewing project configuration
  2. 2. Navigate to the ESP-IDF installation directory and fetch updates: 'cd $IDF_PATH && git fetch origin'
  3. 3. Check available tags to identify fixed releases: 'git tag | grep -E '^v5\.[0-9]' | sort -V'
  4. 4. Upgrade to a release version after 5.5.1 (e.g., v5.5.2 or later stable release) using: 'git checkout <fixed_tag>'
  5. 5. Re-install ESP-IDF environment: './install.sh' (or 'install.bat' on Windows)
  6. 6. Set the new environment: 'source export.sh' (or 'export.bat' on Windows)
  7. 7. Rebuild the project to verify the fix compiles correctly
Caveat Minor: Ensure Bluetooth SDP functionality is tested after upgrade; no API changes expected for user applications

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-68473 in production — separate from our analysis above.

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