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Advisories

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via realloc

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Severity
medium
Date
Affecting

  • wasmtime >= 46.0.0, < 48.0.6

  • wasmtime >= 49.0.0, < 49.0.3

CWE
  • CWE-1265 Unintended Reentrant Invocation of Non-reentrant Code Via Nested Calls
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
tschneidereit
Description
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious Wasm modules to panic the host because the may_leave flag is not cleared during realloc. Attackers can call into the host from realloc while lowering stream or future results, such as cancelling the active read or re-waiting a waitable-set, crashing the host.

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