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In SQLite 3.44.0 through 3.49.0 before 3.49.1, the concat_ws() SQL function can cause memory to be written beyond the end of a malloc-allocated buffer. If the separator argument is attacker-controlled and has a large string (e.g., 2MB or more), an integer overflow occurs in calculating the size of the result buffer, and thus malloc may not allocate enough memory.

🗓️ 04 Sep 2025 00:06:55Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 1 Views

In sqlite before 3.49.1, concat_ws can overflow memory if the separator is large, causing memory allocation overflow.

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04 Sep 2025 00:06Current
7High risk
Vulners AI Score7
CVSS 3.13.2 - 7.5
EPSS0.00072
SSVC
1