From d27d6d64da6516572171df5681b3285f9a0c7633 Mon Sep 17 00:00:00 2001 From: "J. Nick Koston" Date: Wed, 14 Jan 2026 14:00:57 -1000 Subject: [PATCH] Update esphome/components/mqtt/mqtt_component.cpp Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- esphome/components/mqtt/mqtt_component.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/esphome/components/mqtt/mqtt_component.cpp b/esphome/components/mqtt/mqtt_component.cpp index 66f6a1e6255..70b9936c894 100644 --- a/esphome/components/mqtt/mqtt_component.cpp +++ b/esphome/components/mqtt/mqtt_component.cpp @@ -232,7 +232,7 @@ bool MQTTComponent::send_discovery_() { #else const char *fmt = ver_fmt; #endif - // sizeof(ver_fmt) + 8: format specifier expands to 8 hex digits, plus safety margin + // Buffer sized for format string expansion: ~4 bytes net growth from format specifier to 8 hex digits, plus safety margin char version_buf[sizeof(ver_fmt) + 8]; snprintf(version_buf, sizeof(version_buf), fmt, App.get_config_hash()); device_info[MQTT_DEVICE_SW_VERSION] = version_buf;