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CVE-2021-44142 is a critical memory corruption vulnerability in Samba’s vfs_fruit module, which uses extended file attributes to provide enhanced interoperability with Apple SMB clients and Netatalk AFP environments. In affected Samba releases prior to 4.13.17, 4.14.12, and 4.15.5, specially crafted extended file attributes can trigger out-of-bounds heap read and write conditions in the vfs_fruit code path when the module is configured. The flaw is remotely reachable by an attacker who can write extended file attributes on a Samba share using the vulnerable module. Successful exploitation can corrupt heap memory and lead to arbitrary code execution in the smbd process context, which commonly runs with root privileges.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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 historical Samba remote code execution vulnerability mentioned only as part of vendor security history.
A historical Samba vulnerability allowing root RCE via the vfs_fruit module, mentioned only for background context.
A previously addressed Samba vfs_fruit module remote code execution vulnerability mentioned as historical context.
Known vulnerability in Samba’s vfs_fruit module referenced as part of the actor’s CVE research.
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.