From e12f3631d4bcb60423b44ab2c433838a36f41c46 Mon Sep 17 00:00:00 2001
From: Carter Li <zhangsongcui3371@sina.com>
Date: Fri, 3 Jul 2026 15:37:38 +0800
Subject: [PATCH] OS (Linux): fixes potencial issue

---
 src/detection/os/os_linux.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/detection/os/os_linux.c b/src/detection/os/os_linux.c
index 6bdb37b9d..9e1fcef37 100644
--- a/src/detection/os/os_linux.c
+++ b/src/detection/os/os_linux.c
@@ -332,7 +332,9 @@ FF_A_UNUSED static void detectDeepinEnhancement(FFOSResult* result) {
 
 FF_A_UNUSED static void detectAstraVersion(FFOSResult* result) {
     // `PRETTY_NAME` is just `Astra Linux`; the version is in `VERSION_ID`, e.g. `2.12_x86-64`
-    ffStrbufAppendSUntilC(&result->version, result->versionID.chars, '_');
+    if (result->version.length == 0) { // Should be empty. Just in case
+        ffStrbufAppendSUntilC(&result->version, result->versionID.chars, '_');
+    }
     if (result->version.length > 0) {
         ffStrbufAppendC(&result->prettyName, ' ');
         ffStrbufAppend(&result->prettyName, &result->version);