Security Bulletin: This Power System update is being released to address CVE-2025-49087

Summary Mbed-TLS is used by partition firmware for Linux secure boot. This update is being released to mitigate any potential impacts to Linux partitions with secure boot enabled. Vulnerability Details CVEID:CVE-2025-49087 DESCRIPTION: In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing...

January 24, 2026—KB5078131 (OS Build 17763.8281) Out-of-band

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January 24, 2026—KB5078129 (OS Builds 19045.6812 and 19044.6812) Out-of-band

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Linux Distros Unpatched Vulnerability : CVE-2026-21265

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affecte...

MiracleLinux 8 : grub2-2.02-142.el8.1.ML.1 (AXSA:2023-4726:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2023-4726:01 advisory. grub2: Buffer overflow in grubfontconstructglyph can lead to out-of-bound write and possible secure boot bypass CVE-2022-2601 grub2: Heap based...

MiracleLinux 8 : shim-15.8-4.el8_9.ML.1 (AXSA:2024-7744:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-7744:01 advisory. shim: RCE in http boot support may lead to Secure Boot bypass CVE-2023-40547 shim: Interger overflow leads to heap buffer overflow in...

MiracleLinux 9 : fwupd-1.8.10-2.el9.ML.1 (AXSA:2023-5696:02)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2023-5696:02 advisory. fwupd: world readable password in /etc/fwupd/redfish.conf CVE-2022-3287 shim: 3rd party shim allow secure boot bypass CVE-2022-34301 shim: 3rd party...

MiracleLinux 7 : grub2-2.02-0.87.14.0.1.el7.AXS7 (AXSA:2024-7721:02)

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2024-7721:02 advisory. grub2: Buffer overflow in grubfontconstructglyph can lead to out-of-bound write and possible secure boot bypass CVE-2022-2601 Tenable has extracted the...

MiracleLinux 8 : fwupd-1.5.9-1.el8.ML.1 (AXSA:2022-2904:01)

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2022-2904:01 advisory. grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 grub2: Use-after-free in rmmod...

MiracleLinux 8 : shim-unsigned-x64-15.4-4.el8.ML.2 (AXSA:2021-2174:02)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-2174:02 advisory. grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 grub2: Use-after-free in rmmod...

MiracleLinux 9 : grub2-2.06-46.el9.3.ML.1 (AXSA:2023-5114:03)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2023-5114:03 advisory. grub2: Buffer overflow in grubfontconstructglyph can lead to out-of-bound write and possible secure boot bypass CVE-2022-2601 grub2: Heap based...

MiracleLinux 8 : grub2-2.02-90.1.0.1.el8 (AXSA:2021-1565:02)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-1565:02 advisory. grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 grub2: Use-after-free in rmmod...

January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band

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January 17, 2026—KB5077795 (OS Build 17763.8280) Out-of-band

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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004420)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004420 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...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001356)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001356 advisory. A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down usually due to Secure Boot guest system running on to...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004079)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004079 advisory. An issue was discovered in drivers/acpi/acpiconfigfs.c in the Linux kernel before 5.7.7. Injection of malicious ACPI tables via configfs could be used by attackers t...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004224)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004224 advisory. An issue was discovered in drivers/acpi/acpiconfigfs.c in the Linux kernel before 5.7.7. Injection of malicious ACPI tables via configfs could be used by attackers t...

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...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004317)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004317 advisory. A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down usually due to Secure Boot guest system running on to...