[From nobody Wed May 6 19:35:07 2026 Received: (at submit) by bugs.debian.org; 23 Jan 2026 16:50:05 +0000 X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02 (2024-03-25) on buxtehude.debian.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=4.0 tests=BAYES_00, FOURLA, FROMDEVELOPER, KHOP_HELO_FCRDNS,MD5_SHA1_SUM,RCVD_IN_VALIDITY_CERTIFIED_BLOCKED, RCVD_IN_VALIDITY_RPBL_BLOCKED,RCVD_IN_VALIDITY_SAFE_BLOCKED, RDNS_DYNAMIC,SPF_HELO_NONE,SPF_NONE,XMAILER_REPORTBUG autolearn=ham autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02 X-Spam-Bayes: score:0.0000 Tokens: new, 57; hammy, 150; neutral, 107; spammy, 0. spammytokens: hammytokens:0.000-+--H*F:U*carnil, 0.000-+--XDebbugsCc, 0.000-+--X-Debbugs-Cc, 0.000-+--HTo:N*Debian, 0.000-+--H*Ad:N*Bug Return-path: <carnil@debian.org> Received: from c-82-192-244-13.customer.ggaweb.ch ([82.192.244.13]:42468 helo=eldamar.lan) by buxtehude.debian.org with esmtp (Exim 4.96) (envelope-from <carnil@debian.org>) id 1vjKMF-00DLFP-0K for submit@bugs.debian.org; Fri, 23 Jan 2026 16:50:05 +0000 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Salvatore Bonaccorso <carnil@debian.org> To: Debian Bug Tracking System <submit@bugs.debian.org> Subject: arduino-core-avr: CVE-2025-69209 Message-ID: <176918700108.3233596.1009298960273204926.reportbug@eldamar.lan> X-Mailer: reportbug 13.2.0 Date: Fri, 23 Jan 2026 17:50:01 +0100 Delivered-To: submit@bugs.debian.org Source: arduino-core-avr Version: 1.8.6+dfsg-2 Severity: important Tags: security upstream Forwarded: https://github.com/arduino/ArduinoCore-avr/pull/613 X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org> Hi, The following vulnerability was published for arduino-core-avr. CVE-2025-69209[0]: | ArduinoCore-avr contains the source code and configuration files of | the Arduino AVR Boards platform. A vulnerability in versions prior | to 1.8.7 allows an attacker to trigger a stack-based buffer overflow | when converting floating-point values to strings with high | precision. By passing very large `decimalPlaces` values to the | affected String constructors or concat methods, the `dtostrf` | function writes beyond fixed-size stack buffers, causing memory | corruption and denial of service. Under specific conditions, this | could enable arbitrary code execution on AVR-based Arduino boards. | ### Patches - The Fix is included starting from the `1.8.7` release | available from the following link [ArduinoCore-avr | v1.8.7](https://github.com/arduino/ArduinoCore-avr) - The Fixing | Commit is available at the following link [1a6a417f89c8901dad646efce | 74ae9d3ddebfd59](https://github.com/arduino/ArduinoCore- | avr/pull/613/commits/1a6a417f89c8901dad646efce74ae9d3ddebfd59) ### | References - [ASEC-26-001 ArduinoCore-avr vXXXX Resolves Buffer | Overflow Vulnerability](https://support.arduino.cc/hc/en- | us/articles/XXXXX) ### Credits - Maxime Rossi Bellom and Ramtine | Tofighi Shirazi from SecMate (https://secmate.dev/) If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2025-69209 https://www.cve.org/CVERecord?id=CVE-2025-69209 [1] https://github.com/arduino/ArduinoCore-avr/pull/613 [2] https://github.com/arduino/ArduinoCore-avr/security/advisories/GHSA-pvx3-fm7w-6hjm [3] https://github.com/arduino/ArduinoCore-avr/commit/82a8ad2fb33911d8927c7af22e0472b94325d1a7 [4] https://support.arduino.cc/hc/en-us/articles/24985906702748-ASEC-26-001-ArduinoCore-AVR-v1-8-7-Resolves-Stack-Based-Buffer-Overflow-Vulnerability Please adjust the affected versions in the BTS as needed. Regards, Salvatore ]