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CVE-2025-70291 is an integer-overflow vulnerability in Denx U-Boot's do_mv directory-move command. Missing validation of string-length addition can cause the calculated allocation size for a constructed path to wrap, producing an undersized heap allocation. Subsequent copying with strcpy() can then write beyond the allocated heap buffer. U-Boot releases through v2026.01-rc4 are affected; the issue is fixed in v2026.04-rc1 and the upstream master branch.
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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.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.