CVE-2026-85509
Stack buffer overflow in FreeIPMI FRU parsing allowing remote code execution.
Is CVE-2026-85509 being exploited?
Not confirmed. CVE-2026-85509 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 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-85509?
CVE-2026-85509 is rated Critical with a CVSS score of 9.8. 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-2026-85509?
Yes. A fix has been recorded for CVE-2026-85509. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-85509 affect?
CVE-2026-85509 affects FreeIPMI < 1.6.19, Systems using FreeIPMI IPMI tools/agents, Servers with IPMI/BMC management. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-85509?
Upgrade to FreeIPMI 1.6.19+ and restrict/segment IPMI/BMC network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via crafted BMC/FRU response; attacker controlling BMC or network can execute arbitrary code as the FreeIPMI process.
Immediate action required
- affected< 1.6.19
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.