What is CVE-2025-33131?

CVE-2025-33131 is a medium-severity vulnerability in Ibm Aix, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-10-28.

How severe is CVE-2025-33131?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Ibm Aix

CVE-2025-33131

IBM DB2 High Performance Unload 6.1.0.3, 5.1.0.1, 6.1.0.2, 6.5, 6.5.0.0 IF1, 6.1.0.1, 6.1, and 5.1 could allow an authenticated user to cause the program to crash due to a buffer being overwritten when it is allocated on the stack.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ibm Aix
Ibm Db2 High Performance Unload — versions 6.1.0.3, 5.1.0.1, 6.1.0.2
Ibm Db2_high_performance_unload_load — versions 6.1.0.1, 6.1.0.2, 6.1.0.3
Ibm Linux_on_ibm_z
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-33131?: CVE-2025-33131 is a medium-severity vulnerability in Ibm Aix, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-10-28.
How severe is CVE-2025-33131?: Medium severity. CVSS v3 base score is 6.5 out of 10.