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TI-2023-24240 Aliases CVE-2023-45235GHSA-h9v6-q439-p7j2

Buffer Overflow in EDK II Network Package

Priority HIGH 79CWE-119Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

EDK2's Network Package is susceptible to a buffer overflow vulnerability when handling Server ID option from a DHCPv6 proxy Advertise message. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality, Integrity and/or Availability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01223 68th percentileScored 2026-11-07
Fix Fixed Red Hat: 8 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TianoCoreedk2edk2-stable202308—No fix listedCNA
  • edk2 VendorTianoCore Affected edk2-stable202308 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:*up to 202311VulnerableTianoCore
  • cpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:* Versions up to 202311 Vulnerable ·TianoCore

Remediation

Red Hat 8 advisories

  • RHSA-2024:8455 Released 2024-10-24 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) edk2-20220126gitbb1bba3d77-2.el8_6.6, edk2-ovmf-20220126gitbb1bba3d77-2.el8_6.6
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) edk2-20220126gitbb1bba3d77-2.el8_6.6, edk2-aarch64-20220126gitbb1bba3d77-2.el8_6.6, edk2-ovmf-20220126gitbb1bba3d77-2.el8_6.6
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) edk2-20220126gitbb1bba3d77-2.el8_6.6, edk2-ovmf-20220126gitbb1bba3d77-2.el8_6.6
  • RHSA-2024:8449 Released 2024-10-24 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) edk2-20200602gitca407c7246bf-4.el8_4.6, edk2-ovmf-20200602gitca407c7246bf-4.el8_4.6
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) edk2-20200602gitca407c7246bf-4.el8_4.6, edk2-ovmf-20200602gitca407c7246bf-4.el8_4.6
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) edk2-20200602gitca407c7246bf-4.el8_4.6, edk2-ovmf-20200602gitca407c7246bf-4.el8_4.6
  • RHSA-2024:6931 Released 2024-09-23 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) edk2-20220126gitbb1bba3d77-3.el9_0.5, edk2-aarch64-20220126gitbb1bba3d77-3.el9_0.5, edk2-ovmf-20220126gitbb1bba3d77-3.el9_0.5
Show 5 more Red Hat advisories
  • RHSA-2024:6845 Released 2024-09-19 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) edk2-20220126gitbb1bba3d77-4.el8_8.5, edk2-aarch64-20220126gitbb1bba3d77-4.el8_8.5, edk2-ovmf-20220126gitbb1bba3d77-4.el8_8.5
  • RHSA-2024:6849 Released 2024-09-19 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) edk2-20190829git37eef91017ad-9.el8_2.5, edk2-ovmf-20190829git37eef91017ad-9.el8_2.5
  • RHSA-2024:4419 Released 2024-07-09 · Red Hat rating Important
    edk2 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) edk2-aarch64-20221207gitfff6d81270b5-9.el9_2.3, edk2-ovmf-20221207gitfff6d81270b5-9.el9_2.3, edk2-tools-20221207gitfff6d81270b5-9.el9_2.3 +1
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) edk2-20221207gitfff6d81270b5-9.el9_2.3, edk2-aarch64-20221207gitfff6d81270b5-9.el9_2.3, edk2-ovmf-20221207gitfff6d81270b5-9.el9_2.3
  • RHSA-2024:3017 Released 2024-05-22 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream (v. 8) edk2-20220126gitbb1bba3d77-13.el8_10, edk2-aarch64-20220126gitbb1bba3d77-13.el8_10, edk2-ovmf-20220126gitbb1bba3d77-13.el8_10
  • RHSA-2024:2264 Released 2024-04-30 · Red Hat rating Important
    edk2 security update
    • Red Hat Enterprise Linux AppStream (v. 9) edk2-20231122-6.el9, edk2-aarch64-20231122-6.el9, edk2-ovmf-20231122-6.el9
    • Red Hat Enterprise Linux CRB (v. 9) edk2-aarch64-20231122-6.el9, edk2-ovmf-20231122-6.el9, edk2-tools-20231122-6.el9 +1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:4419
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2024:3017
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2264
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2024:6849
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2024:8449
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2024:8455
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2024:8449
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2024:8455
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2024:6931
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2024:6845
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:4419
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2024:8449
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2024:8455
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:2264

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-45235
  2. 2026-10-03 Alias added: GHSA-h9v6-q439-p7j2

References

Advisory 2

Other 3

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-24238 Infinite loop in EDK II Network Package CVSS 3.1HIGH 7.5
  • TI-2023-24235 Buffer Overflow in EDK II Network Package CVSS 3.1HIGH 8.8
  • TI-2023-26565 An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. CVSS 3.1MEDIUM 6.7
  • TI-2023-24236 Out-of-Bounds Read in EDK II Network Package CVSS 3.1MEDIUM 6.5
  • TI-2021-16172 Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize. CVSS 3.1CRITICAL 9.8
See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences