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FatFs R0.16 and earlier contains a stack-based buffer overflow in the exFAT handling path of f_getlabel(). The vulnerability exists because the function trusts the exFAT volume-label length field (XDIR_NumLabel) and does not enforce the specification maximum before copying the label into a caller-provided buffer. A crafted exFAT filesystem can therefore supply an oversized label length that causes f_getlabel() to perform an oversized write into a stack-resident label buffer, resulting in memory corruption in embedded firmware that uses the library.
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No public exploit code observed for this vulnerability.
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15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity exFAT label-length stack overflow in FatFs f_getlabel() that allows oversized writes into label buffers, causing memory corruption in embedded firmware.
A buffer overflow in FatFs involving the exFAT volume-label field that can cause memory corruption.
A FatFs vulnerability where an uncapped exFAT label-length field in f_getlabel() enables oversized writes into caller-provided stack buffers, causing memory corruption.
A FatFs buffer overflow triggered by a malformed exFAT volume-label field, enabling memory corruption.
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.