Alerts This Week
Warning Icon 1 1,111
Alerts This Week
Warning Icon 1 1,111

Ubuntu 24.04 EDK II Critical Severity Vulnerability DoS USN-7894-3

ubuntu
Calendar Grey November 28, 2025
Dist Ubuntu Esm H88
EDK II regression impacts Ubuntu 22.04 and 24.04 LTS, urging updates due to critical network boot issues.
USN-7894-1 introduced a regression in EDK II

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 attack...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service high severity Ubuntu regression EDK II

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://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2133157

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7894-2

Topics%20covered

Topics Covered

security advisory denial of service high severity Ubuntu regression EDK II

Package Information

https://launchpad.net/ubuntu/+source/edk2/2024.02-2ubuntu0.7
https://launchpad.net/ubuntu/+source/edk2/2022.02-3ubuntu0.22.04.5

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here