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DFVULN-839 - Use-After-Free in MessagePack::Buffer#clear Enables Cross-Buffer Disclosure

🗓️ 09 Jun 2026 00:00:00Reported by RubySecType 
rubygems
 rubygems
🔗 rubysec.com👁 20 Views

MessagePack::Buffer#clear frees a 4 KiB page, leaves rmem pointers, enabling use-after-free disclosure.

Related
Detection
Refs
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NVD
CVE-2026-54522
30 Jul 202617:16
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Rows per page
Vulners
Node
rubymsgpackRange1.8.2

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09 Jun 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.15.4
CVSS 42.1
EPSS0.00136
SSVC
20