(xerces-c) branch xerces-3.3 updated: XERCESC-2267 - Seg fault in regexp parser due to underflow

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asf-gitbox-commits pushed a commit to branch xerces-3.3
in repository https://gitbox.apache.org/repos/asf/xerces-c.git


The following commit(s) were added to refs/heads/xerces-3.3 by this push:
     new e5a73625d XERCESC-2267 - Seg fault in regexp parser due to underflow
e5a73625d is described below

commit e5a73625d21f074465fa1820f3cb8d337a8b4e5c
Author: Scott Cantor <[email protected]>
AuthorDate: Thu Aug 13 12:48:44 2026 -0400

    XERCESC-2267 - Seg fault in regexp parser due to underflow
    
    https://issues.apache.org/jira/browse/XERCESC-2267
---
 src/xercesc/util/regx/RangeToken.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/xercesc/util/regx/RangeToken.cpp b/src/xercesc/util/regx/RangeToken.cpp
index d6c3cacbc..51ca9a01f 100644
--- a/src/xercesc/util/regx/RangeToken.cpp
+++ b/src/xercesc/util/regx/RangeToken.cpp
@@ -359,6 +359,9 @@ void RangeToken::addRange(const XMLInt32 start, const XMLInt32 end) {
         fSorted = true;
     }
     else {
+        if (fElemCount == 0) {
+                ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Regex_NotSupported, fMemoryManager);
+        }
 
         if (fRanges[fElemCount-1] + 1 == val1) {