CVE-2025-1991 - Integer Underflow (Wrap or Wraparound)

Severity

75%

Complexity

39%

Confidentiality

60%

IBM Informix Dynamic Server 12.10,14.10, and15.0 could allow a remote attacker to cause a denial of service due to an integer underflow when processing packets.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Demo Examples

Integer Underflow (Wrap or Wraparound)

CWE-191

The following example subtracts from a 32 bit signed integer.


               
}
return 0;

The example has an integer underflow. The value of i is already at the lowest negative value possible, so after subtracting 1, the new value of i is 2147483647.

Overview

First reported 3 months ago

2025-06-28 13:15:00

Last updated 1 month ago

2025-08-14 01:08:00

Affected Software

IBM Informix Dynamic Server 12.10

12.10

References

https://www.ibm.com/support/pages/node/7238455

https://www.ibm.com/support/pages/node/7238455

Vendor Advisory

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