CVE-2026-86093 Memory corruption in Db2
Attackers controlling DRDA endpoints can execute arbitrary commands on Db2 clients via a stack-based buffer overflow in the federated server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86093?
CVE-2026-86093 is a high-severity memory corruption vulnerability in Ibm Db2, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 could allow an attacker with the ability to control or impersonate a DRDA server endpoint to execute arbitrary commands on Db2 clients due to a stack-based buffer overflow that improperly copies user-controlled data into a fixed-size stack buffer without bounds checking.
Weakness: CWE-121
Which versions are affected by CVE-2026-86093?
It affects 1 product.
Products include Ibm Db2.
How do I fix CVE-2026-86093?
No fix has been published for CVE-2026-86093 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-86093 being exploited?
There is no known exploitation of CVE-2026-86093 in the wild and no public exploit code.
Other vulnerabilities in Ibm Db2
Sources
Also known as GHSA-mrp9-r5xj-678r.