Vulnerability-Lookup

RHSA-2026:18465

Vulnerability from csaf_redhat - Published: 2026-05-19 10:11 - Updated: 2026-05-19 15:23

Summary

Red Hat Security Advisory: edk2 security update

Severity

Important

Notes

Topic: An update for edk2 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: 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: EDK2: Improper Input Validation allows arbitrary command execution (CVE-2025-2296) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-2296

A flaw was found in EDK2 (EFI Development Kit 2). This vulnerability allows an attacker to cause arbitrary command execution and impact Confidentiality, Integrity, and Availability via improper input validation by local access.

8.2 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CWE-20 - Improper Input Validation

Affected products

Fixed 20 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.GA:edk2-0:20251114-5.el10_2.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-aarch64-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-debugsource-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-debugsource-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-ovmf-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-tools-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-tools-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-tools-debuginfo-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-tools-debuginfo-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.GA:edk2-tools-doc-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-0:20251114-5.el10_2.src	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-aarch64-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-debugsource-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-debugsource-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-ovmf-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-tools-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-tools-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-tools-debuginfo-0:20251114-5.el10_2.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-tools-debuginfo-0:20251114-5.el10_2.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: CRB-10.2.GA:edk2-tools-doc-0:20251114-5.el10_2.noarch	—	Vendor Fix fix Workaround

Threats

Impact Important

References

16 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:18465	self
https://docs.redhat.com/en/documentation/red_hat_…	external
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2420637	external
https://issues.redhat.com/browse/RHEL-112106	external
https://issues.redhat.com/browse/RHEL-116433	external
https://issues.redhat.com/browse/RHEL-118386	external
https://issues.redhat.com/browse/RHEL-138335	external
https://issues.redhat.com/browse/RHEL-147785	external
https://issues.redhat.com/browse/RHEL-150696	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2025-2296	self
https://bugzilla.redhat.com/show_bug.cgi?id=2420637	external
https://www.cve.org/CVERecord?id=CVE-2025-2296	external
https://nvd.nist.gov/vuln/detail/CVE-2025-2296	external
https://github.com/tianocore/edk2/security/adviso…	external

JSON

To clipboard

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  "vulnerabilities": [
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      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "discovery_date": "2025-12-09T16:01:20.195884+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2420637"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in EDK2 (EFI Development Kit 2). This vulnerability allows an attacker to cause arbitrary command execution and impact Confidentiality, Integrity, and Availability via improper input validation by local access.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "edk2: EDK2: Improper Input Validation allows arbitrary command execution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is considered Important because it compromises a key security control in the boot chain, Secure Boot enforcement\u2014by allowing an unsigned kernel to be loaded through the legacy fallback path when direct-boot signature verification fails. Although exploitation requires high privileges, the flaw enables a reliable and unintended bypass of a protection mechanism explicitly designed to prevent unauthorized code from executing during early boot. This loss of integrity in a security-critical stage gives attackers the opportunity to introduce persistent modifications, tamper with system state, or load manipulated kernels outside the trusted key database. The impact is therefore more significant than a moderate flaw, as it affects a foundational trust anchor rather than a user-space component, and can meaningfully weaken the platform\u2019s security posture even under restricted privilege conditions.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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      "product_status": {
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          "url": "https://access.redhat.com/security/cve/CVE-2025-2296"
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        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-2296",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-2296"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-2296",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-2296"
        },
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:18465"
        },
        {
          "category": "workaround",
          "details": "To reduce the risk by disabling direct-boot mode, ensuring all bootable kernels are signed and present in the Secure Boot DB, and restricting privileged access to prevent attackers from introducing unsigned payloads.",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "edk2: EDK2: Improper Input Validation allows arbitrary command execution"
    }
  ]
}

CVE-2025-2296 (GCVE-0-2025-2296)

Vulnerability from cvelistv5 – Published: 2025-12-09 15:00 – Updated: 2025-12-09 15:11

Title

Un-verified kernel bypass Secure Boot mechanism in direct boot mode

Summary

EDK2 contains a vulnerability in BIOS where an attacker may cause “ Improper Input Validation” by local access. Successful exploitation of this vulnerability could alter control flow in unexpected ways, potentially allowing arbitrary command execution and impacting Confidentiality, Integrity, and Availability.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L

CWE

CWE-20 - Improper Input Validation

Assigner

TianoCore

References

1 reference

URL	Tags
https://github.com/tianocore/edk2/security/adviso…

Impacted products

1 product

Vendor	Product	Version
TianoCore	EDK2	Affected: 0 , < edk2-stable202502 (Custom)

Date Public

2025-12-09 15:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:18465

CVE-2025-2296 (GCVE-0-2025-2296)

Tags

Sightings

Nomenclature