A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.
CVSS Details
- CVSS 3.1 Base Score: 6.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade grub2-emuUpgrade grub2-tools-efi-debuginfoUpgrade grub2-efi-aa64-modulesUpgrade grub2-emu-modulesUpgrade grub2-tools-extraUpgrade grub2-tools-extra-debuginfoUpgrade grub2-emu-debuginfoUpgrade grub2-efi-x64-modulesUpgrade grub2-tools-efiUpgrade grub2-commonUpgrade grub2-toolsUpgrade grub2-tools-debuginfoUpgrade grub2-debuginfoUpgrade grub2-tools-minimalUpgrade grub2-efi-aa64-ec2Upgrade grub2-efi-x64Upgrade grub2-efi-x64-ec2Upgrade grub2-pc-modulesUpgrade grub2-efi-aa64Upgrade grub2-tools-minimal-debuginfoUpgrade grub2-efi-x64-cdbootUpgrade grub2-pcUpgrade grub2-efi-aa64-cdbootUpgrade grub2-debugsource | Apr 15, 2025 | Feb 18, 2025 |
| Debian | — | Upgrade grub2 | May 15, 2025 | Mar 3, 2025 |
| Dell Powerstore Dsa2025342 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | Sep 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp10 | — | Upgrade grub2-commonUpgrade grub2-toolsUpgrade grub2-tools-extraUpgrade grub2-tools-minimalUpgrade grub2-efi-aa64-modulesUpgrade grub2-efi-aa64 | May 13, 2025 | Mar 3, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade grub2-tools-extraUpgrade grub2-toolsUpgrade grub2-commonUpgrade grub2-efi-aa64-modulesUpgrade grub2-tools-minimalUpgrade grub2-efi-aa64 | Jun 13, 2025 | Mar 3, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade grub2-toolsUpgrade grub2-tools-minimalUpgrade grub2-tools-extraUpgrade grub2-commonUpgrade grub2-efi-aa64Upgrade grub2-efi-aa64-modules | Jun 11, 2025 | Mar 3, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade grub2-toolsUpgrade grub2-tools-efiUpgrade grub2-efi-x64Upgrade grub2-pcUpgrade grub2-tools-minimalUpgrade grub2-tools-extraUpgrade grub2-efi-x64-modulesUpgrade grub2-commonUpgrade grub2-pc-modules | Jun 11, 2025 | Mar 3, 2025 |
| Suse | — | Upgrade grub2-branding-upstreamUpgrade grub2-powerpc-ieee1275-extrasUpgrade grub2Upgrade grub2-i386-pcUpgrade grub2-s390x-emu-debugUpgrade grub2-x86_64-efi-debugUpgrade grub2-i386-pc-debugUpgrade grub2-arm64-efi-debugUpgrade grub2-systemd-sleep-pluginUpgrade grub2-i386-pc-extrasUpgrade grub2-s390x-emuUpgrade grub2-x86_64-xen-extrasUpgrade grub2-x86_64-xen-debugUpgrade grub2-x86_64-efiUpgrade grub2-s390x-emu-extrasUpgrade grub2-i386-xen-debugUpgrade grub2-x86_64-xenUpgrade grub2-powerpc-ieee1275Upgrade grub2-arm64-efiUpgrade grub2-commonUpgrade grub2-powerpc-ieee1275-debugUpgrade grub2-x86_64-efi-extrasUpgrade grub2-snapper-pluginUpgrade grub2-arm64-efi-extras | Dec 5, 2025 | Jun 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 2, 2025 | Mar 3, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub