Bug 2559297 (CVE-2026-115386) - CVE-2026-115386 wasmtime: wasmtime: Information disclosure via uninitialized struct padding in fd_readdir
Summary: CVE-2026-115386 wasmtime: wasmtime: Information disclosure via uninitialized ...
Keywords:
Status: NEW
Alias: CVE-2026-115386
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-22 20:18 UTC by OSIDB Bzimport
Modified: 2026-10-29 17:16 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-10-22 20:18:58 UTC 
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an information disclosure vulnerability in the WASIp1 fd_readdir implementation that copies uninitialized struct padding into guest memory. Guests with a preopened directory can list entries to receive three bytes of leftover host stack or heap memory per directory entry.
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