From b777ca5fa19f56a0978a6d167d30aa94de9571fd Mon Sep 17 00:00:00 2001
From: Joshua Rogers <MegaManSec@users.noreply.github.com>
Date: Mon, 3 Nov 2025 03:52:55 +0000
Subject: [PATCH] SNMP: Clear community aliases to avoid dangling pointer
 (#2215)

Currently not a issue, but reduces UAF hazard in the future
---
 src/snmp_core.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/snmp_core.cc b/src/snmp_core.cc
index ffd93c2063..c28a412241 100644
--- a/src/snmp_core.cc
+++ b/src/snmp_core.cc
@@ -423,7 +423,9 @@ snmpDecodePacket(SnmpRequest * rq)
             snmp_free_pdu(PDU);
         }
         xfree(Community);
-
+        rq->community = nullptr;
+        rq->session.community = nullptr;
+        rq->session.community_len = 0;
     } else {
         debugs(49, DBG_IMPORTANT, "WARNING: Failed SNMP agent query from : " << rq->from);
         snmp_free_pdu(PDU);
-- 
2.47.3