# CVE-2025-0686: grub2: A flaw was found in grub2 CVE-2025-0686 is fixed in 25 products on 1 platform, first by SUSE-SU-2025:0586-1, released February 19, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-0686 - Priority: Routine - CVSS: 6.4 (medium) - EPSS: 0.0029 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 19, 2025 ## Description A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_romfs_read_symlink() may cause out-of-bounds writes when the calling grub_disk_read() function. This issue may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution by-passing secure boot protections. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | grub2 Debian 12.15 (bookworm) | 2.06-13+deb12u2 | [DEBIAN-CVE-2025-0686](https://patchblox.com/security/data/fix/linux/debian-cve-2025-0686.md) | Mar 3, 2025 | | Linux | grub2 Debian 13.5 (trixie) | 2.12-6 | [DEBIAN-CVE-2025-0686](https://patchblox.com/security/data/fix/linux/debian-cve-2025-0686.md) | Mar 3, 2025 | | Linux | grub2 Debian 14 | 2.12-6 | [DEBIAN-CVE-2025-0686](https://patchblox.com/security/data/fix/linux/debian-cve-2025-0686.md) | Mar 3, 2025 | | Linux | grub2 opensuse-leap 15.6 | 2.12-150600.8.18.2 | [SUSE-SU-2025:0586-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0586-1.md) | Feb 19, 2025 | | Linux | grub2 sles 15.6 | 2.12-150600.8.18.2 | [SUSE-SU-2025:0586-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0586-1.md) | Feb 19, 2025 | | Linux | grub2-common amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-debugsource amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-aa64 amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-aa64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-aa64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-aa64-modules amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-x64 amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-x64-cdboot amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-x64-ec2 amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-efi-x64-modules amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-emu amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-emu-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-emu-modules amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-pc amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-pc-modules amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-efi amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-efi-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-extra amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-extra-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-minimal amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | | Linux | grub2-tools-minimal-debuginfo amzn 2023 | 1:2.06-61.amzn2023.0.16 | [ALAS2023-2025-937](https://patchblox.com/security/data/fix/linux/alas2023-2025-937.md) | Apr 9, 2025 | --- Data as of 2026-11-08T00:53:09Z UTC. 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