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Medium ALSA-2024:4749 3 CVEs

Moderate: edk2 security update

Published Jul 23, 2024 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

EDK (Embedded Development Kit) is a project to enable UEFI support for Virtual Machines. This package contains a sample 64-bit UEFI firmware for QEMU and KVM.

Security Fix(es):

* EDK2: integer overflow in CreateHob() could lead to HOB OOB R/W (CVE-2022-36765)
* edk2: Predictable TCP Initial Sequence Numbers (CVE-2023-45236)
* edk2: Use of a Weak PseudoRandom Number Generator (CVE-2023-45237)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 4

ReleasePackageFixed in
AlmaLinux · 9 edk2-aarch64 20231122-6.el9_4.2
AlmaLinux · 9 edk2-ovmf 20231122-6.el9_4.2
AlmaLinux · 9 edk2-tools 20231122-6.el9_4.2
AlmaLinux · 9 edk2-tools-doc 20231122-6.el9_4.2

Vulnerabilities 3

  • High 7.0
    CVE-2022-36765

    Integer Overflow in CreateHob

    EDK2 is susceptible to a vulnerability in the CreateHob() function, allowing a user to trigger a integer overflow to buffer overflow via a local network. Successful exploitation of this vulnerability may result in a compromise of confidentiality, integrity, a…

    TianoCore EDK2 edk2 edk2 Debian Ubuntu Azure Linux
  • Medium 5.8
    CVE-2023-45236

    Predictable TCP ISNs in EDK II Network Package

    EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality.

    TianoCore EDK2 edk2 edk2 Debian Ubuntu Azure Linux
  • Medium 5.3
    CVE-2023-45237

    Use of a Weak PseudoRandom Number Generator in EDK II Network Package

    EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality.

    TianoCore EDK2 edk2 edk2 Debian Ubuntu Azure Linux

References

  • report
    https://access.redhat.com/security/cve/CVE-2022-36765
  • report
    https://access.redhat.com/security/cve/CVE-2023-45236
  • report
    https://access.redhat.com/security/cve/CVE-2023-45237
  • report
    https://bugzilla.redhat.com/2257584
  • report
    https://bugzilla.redhat.com/2258703
  • report
    https://bugzilla.redhat.com/2258706
  • advisory
    https://errata.almalinux.org/9/ALSA-2024-4749.html