Loading vulnerability…
CVE-2025-0678 is an integer-overflow vulnerability in GRUB2's squash4 filesystem module. While reading a squash4 filesystem, the module uses filesystem geometry values controlled by the filesystem image to calculate internal buffer sizes. Insufficient validation of arithmetic overflow can cause an undersized allocation. Subsequent data reading writes the expected amount of data into the undersized heap buffer, producing a heap-based out-of-bounds write.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the EulerOS SA-2026-3507 GRUB2 package update.
A vulnerability addressed by the EulerOS SA-2026-3420 security update affecting listed GRUB2 packages.
A GRUB2 bootloader vulnerability disclosed as part of Microsoft's coordinated bootloader research campaign involving GRUB2, U-Boot, and Barebox. The content indicates GRUB2 flaws are significant because exploitation in Secure Boot-trusted bootloaders can undermine the boot chain and enable persistent malware.
A GRUB2 squash4 filesystem integer overflow leading to heap out-of-bounds write during data reads, with possible arbitrary code execution impact.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.