CVE-2022-39393High· 8.6▾ TwilightBug in pooling instance allocator
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.3 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.7%
0.7% → 0.8%
bug in Wasmtime's implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance.
Mitigations are described here.
wasmtime >= 2.0.0, < 2.0.2Upgrade to a patched release:
wasmtime 2.0.2Connected by shared product, vendor, weakness, or advisory.
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