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CVE-2023-20870 is an out-of-bounds read vulnerability in VMware Workstation and VMware Fusion in the functionality that shares host Bluetooth devices with a guest virtual machine. The flaw resides in the virtual Bluetooth device handling path exposed when host Bluetooth hardware is presented to the guest. A related later issue, CVE-2023-34044, was identified as a variant of this vulnerability family and demonstrated that the affected code path could expose sensitive memory from the VMware host process. The vulnerability affects the confidentiality boundary between guest and host by allowing a guest to trigger improper memory reads in the host-side virtualization process.
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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.
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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A VMware Workstation vulnerability referenced only as the antecedent of CVE-2023-34044 in related content.
A related VMware Workstation virtual Bluetooth URB handling vulnerability referenced as the variant ancestor of CVE-2023-34044; prior fixes set actualLen to 8 for certain unprocessed URBs.
A VMware vulnerability referenced only as the original issue of which CVE-2023-34044 is a variant.
A VMware vulnerability referenced only as the variant parent of CVE-2023-34044 in related content.
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.