Affects widely used enterprise DB (IBM Db2); privilege escalation risk that could impact many organizations.
CVE-2026-10535
Buffer overflow in IBM Db2 setgid helper may allow local privilege escalation.
Is CVE-2026-10535 being exploited?
Not confirmed. CVE-2026-10535 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.11% probability of exploitation in the next 30 days.
How severe is CVE-2026-10535?
CVE-2026-10535 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-10535?
Yes. A fix has been recorded for CVE-2026-10535. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-10535 affect?
CVE-2026-10535 affects IBM Db2 11.5.0-11.5.9, IBM Db2 12.1.0-12.1.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-10535?
Apply vendor updates when released; restrict/disable db2flacc and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local buffer overflow in db2flacc can allow privilege escalation to root or arbitrary code execution on the host.
Patch when possible
- affected>= 11.5.0 and <= 11.5.9
- affected>= 12.1.0 and <= 12.1.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.