Bug 2453963 (CVE-2026-34875)

Summary: CVE-2026-34875 mbedtls: Mbed TLS and TF-PSA-Crypto: Arbitrary code execution due to buffer overflow in FFDH key export
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Mbed TLS and TF-PSA-Crypto. This vulnerability, a buffer overflow, occurs during the export of public keys for FFDH (Finite Field Diffie-Hellman) keys. A remote attacker could exploit this to potentially execute arbitrary code, gaining full control over the affected system, or cause a denial of service, making the system unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2454205, 2454209, 2454201, 2454212, 2454214    
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Description OSIDB Bzimport 2026-04-01 19:02:35 UTC
An issue was discovered in Mbed TLS through 3.6.5 and TF-PSA-Crypto 1.0.0. A buffer overflow can occur in public key export for FFDH keys.