CVE-2026-23352

In the Linux kernel, the following vulnerability has been resolved: x86/efi: defer freeing of boot services memory efifreebootservices frees memory occupied by EFIBOOTSERVICESCODE and EFIBOOTSERVICESDATA using memblockfreelate. There are two issue with that: memblockfreelate should be used for...

CVE-2026-23352

In the Linux kernel, the following vulnerability has been resolved: x86/efi: defer freeing of boot services memory efifreebootservices frees memory occupied by EFIBOOTSERVICESCODE and EFIBOOTSERVICESDATA using memblockfreelate. There are two issue with that: memblockfreelate should be used for...

CVE-2026-23352

In the Linux kernel, the following vulnerability has been resolved: x86/efi: defer freeing of boot services memory efifreebootservices frees memory occupied by EFIBOOTSERVICESCODE and EFIBOOTSERVICESDATA using memblockfreelate. There are two issue with that: memblockfreelate should be used for...

EUVD-2025-208555

Exposure of resource to wrong sphere in the UEFI PdaSmm module for some IntelR reference platforms may allow an information disclosure. System software adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local...

EUVD-2025-208542

Improper buffer restrictions in some UEFI firmware for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable data manipulation. This result may potentially occur via local access whe...

EUVD-2025-208548

Improper input validation in the UEFI FlashUcAcmSmm module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable local code execution. This result may potentially occur via local...

EUVD-2025-208550

Improper input validation in the UEFI ImcErrorHandler module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via...

CVE-2025-22444

Exposure of resource to wrong sphere in the UEFI PdaSmm module for some IntelR reference platforms may allow an information disclosure. System software adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local...

CVE-2025-20068

Improper input validation in the UEFI ImcErrorHandler module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via...

CVE-2025-20064

Improper input validation in the UEFI FlashUcAcmSmm module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable local code execution. This result may potentially occur via local...

CVE-2025-20064

Improper input validation in the UEFI FlashUcAcmSmm module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable local code execution. This result may potentially occur via local...

CVE-2025-20027

CVE-2025-20027: Improper input validation in the UEFI WheaERST module on Intel reference platforms can allow local privilege escalation by a privileged user with high complexity. Affected items are Intel UEFI firmware components; exploitation requires local access and no user interaction. The CVS...

CVE-2025-20027

Improper input validation in the UEFI WheaERST module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local...

CVE-2025-20027

Improper input validation in the UEFI WheaERST module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local...

CVE-2025-20005

Improper buffer restrictions in some UEFI firmware for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable data manipulation. This result may potentially occur via local access whe...

CVE-2025-20005

CVE-2025-20005 : Improper buffer restrictions in some Intel reference-platform UEFI firmware may allow a local-privilege-escalation by a privileged system software adversary. The described attack requires a high-complexity, local attacker with no user interaction and does not rely on remote acces...

PT-2026-24494

Improper input validation in the UEFI ImcErrorHandler module for some IntelR reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via...

PT-2026-24490

Improper input validation in the UEFI firmware for some Intel Reference Platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable data manipulation. This result may potentially occur via local access when...

varstored: TOCTOU issues with mapped guest memory

ISSUE DESCRIPTION varstored is a component of the Xapi toolstack handling UEFI Variables for a VM. It has a communication path with OVMF inside the VM involving mapping a buffer prepared by OVMF. Within varstored, there were insufficient compiler barriers, creating TOCTOU issues with data in the...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004028)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004028 advisory. An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivarssdt ACPI variable could be used by...