CVE-2026-34875
Buffer overflow in FFDH public key export (Mbed TLS/TF-PSA-Crypto)
Is CVE-2026-34875 being exploited?
Not confirmed. CVE-2026-34875 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-34875?
CVE-2026-34875 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-2026-34875?
Yes. A fix has been recorded for CVE-2026-34875. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34875 affect?
CVE-2026-34875 affects Mbed TLS <= 3.6.5, TF-PSA-Crypto <= 1.0.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34875?
Patch to latest vendor release ASAP
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution or crash via crafted FFDH public key export; memory corruption risk.
Immediate action required