========================================================================== Ubuntu Security Notice USN-7894-2 November 28, 2025
edk2 regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: USN-7894-1 introduced a regression in EDK II Software Description: - edk2: UEFI firmware for virtual machines Details: USN-7894-1 fixed vulnerabilities in EDK II. The update introduced a regression in the UEFI network boot. This update reverts the corresponding fixes for CVE-2023-45236 and CVE-2023-45237 pending further investigation. We apologize for the inconvenience. Original advisory details: It was discovered that EDK II was susceptible to a predictable TCP Initial Sequence Number. An attacker could possibly use this issue to gain unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2023-45236, CVE-2023-45237) It was discovered that EDK II incorrectly handled S3 sleep. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298) It was discovered that the EDK II PE/COFF loader incorrectly handled certain memory operations. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-38796) It was discovered that the EDK II PE image hashing function incorrectly handled certain memory operations. An attacker could possibly use this issue to cause a denial of service, or execute arbitrary code. (CVE-2024-38797) It was discovered that the EDK II BIOS incorrectly handled certain memory operations. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-38805, CVE-2025-2295) It was discovered that EDK II incorrectly handled the enabling of MCE. An attacker could possibly use this issue to cause a denial of service, or execute arbitrary code. (CVE-2025-3770) It was discovered that the OpenSSL library embedded in EDK II contained multiple vulnerabilties. An attacker could possibly use these issues to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2021-3712, CVE-2022-0778, CVE-2022-4304, CVE-2022-4450, CVE-2023-0215, CVE-2023-0286, CVE-2023-0464, CVE-2023-0465, CVE-2023-0466, CVE-2023-2650, CVE-2023-3446, CVE-2023-3817, CVE-2023-5678, CVE-2023-6237, CVE-2024-0727, CVE-2024-13176, CVE-2024-2511, CVE-2024-41996, CVE-2024-4741, CVE-2024-5535, CVE-2024-6119, CVE-2024-9143, CVE-2025-9232) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS efi-shell-aa64 2024.02-2ubuntu0.7 efi-shell-arm 2024.02-2ubuntu0.7 efi-shell-ia32 2024.02-2ubuntu0.7 efi-shell-riscv64 2024.02-2ubuntu0.7 efi-shell-x64 2024.02-2ubuntu0.7 ovmf 2024.02-2ubuntu0.7 ovmf-ia32 2024.02-2ubuntu0.7 qemu-efi-aarch64 2024.02-2ubuntu0.7 qemu-efi-arm 2024.02-2ubuntu0.7 qemu-efi-riscv64 2024.02-2ubuntu0.7 Ubuntu 22.04 LTS ovmf 2022.02-3ubuntu0.22.04.5 ovmf-ia32 2022.02-3ubuntu0.22.04.5 qemu-efi 2022.02-3ubuntu0.22.04.5 qemu-efi-aarch64 2022.02-3ubuntu0.22.04.5 qemu-efi-arm 2022.02-3ubuntu0.22.04.5 After a standard system update you need to restart the virtual machines that use the affected firmware to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7894-2 https://ubuntu.com/security/notices/USN-7894-1 https://launchpad.net/bugs/2133157 Package Information: https://launchpad.net/ubuntu/+source/edk2/2024.02-2ubuntu0.7 https://launchpad.net/ubuntu/+source/edk2/2022.02-3ubuntu0.22.04.5
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