Quick answers
- Is CVE-2026-10535 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-10535 being exploited in the wild.
- How severe is CVE-2026-10535?
- High severity, with a CVSS score of 8.4, published 30 July 2026.
- Which products and versions are affected?
- IBM Db2 11.5.0 - 11.5.9, 12.1.0 - 12.1.4.
- Is there a fix for CVE-2026-10535?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-10535 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-10535?
- Check whether you run IBM Db2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow (CWE-121) exists in the db2flacc setgid helper component of IBM Db2. The vulnerability can be triggered by a local attacker with access to an unprivileged shell on Linux or Unix platforms. By exploiting this overflow, an attacker can escalate their privileges, potentially leading to full compromise of the Db2 instance. The issue affects versions 11.5 (up to 11.5.9) and 12.1 (up to 12.1.4). IBM has released special builds for V11.5.9 and V12.1.4 to remediate the flaw; Windows installations are not affected.
Affected products
- IBM Db2 11.5.0 - 11.5.9, 12.1.0 - 12.1.4
Timeline
- 2026-07-10: disclosed: Initial publication by IBM
- 2026-07-14: advisory: Updated to specify privilege escalation impact
- 2026-07-30: advisory: NVD publication date