Ubuntu Security NoticesUSN-8865-1

USN-8865-1: EDK II vulnerabilities

It was discovered that EDK II incorrectly handled CMS key unwrapping in the embedded OpenSSL library. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-63072) It was discovered that EDK II incorrectly handled CMP protection verification in the embedded OpenSSL library. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-63076) It was discovered that EDK II incorrectly buffered DTLS records in the embedded OpenSSL library. A remote attacker could possibly use this issue to cause EDK II to consume excessive memory, resulting in a denial of service. (CVE-2026-54874) It was discovered that EDK II incorrectly verified AEAD tags in the embedded OpenSSL library. An attacker could possibly use this issue to cause EDK II to accept forged messages. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-75803)

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Scope

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Timeline

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Oct 5, 2026 at 11:06 AM UTC
Published by Ubuntu
The publication date reported by the vendor.
Oct 5, 2026 at 2:05 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Oct 5, 2026 at 4:05 PM UTC
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Vulnerabilities

CVEs named in this advisory

CVE-2026-63072View CVSS, KEV, EPSS, and threat context CVE-2026-63076View CVSS, KEV, EPSS, and threat context CVE-2026-54874View CVSS, KEV, EPSS, and threat context CVE-2026-75803View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Ubuntu
Advisory ID: USN-8865-1
Last source check: Oct 5, 2026 at 4:05 PM UTC

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