OSV-2026-603

See a problem?
Import Source
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wasmtime/OSV-2026-603.yaml
JSON Data
https://api.osv.dev/v1/vulns/OSV-2026-603
Published
2026-04-21T00:05:37.586369Z
Modified
2026-04-21T00:05:37.586785Z
Summary
UNKNOWN READ in <wasmtime::runtime::func::Func>::call_unchecked_raw::<
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504268343

Crash type: UNKNOWN READ
Crash state:
<wasmtime::runtime::func::Func>::call_unchecked_raw::<
<wasmtime::runtime::func::Func>::call_impl_do_call::<
wasmtime_internal_fiber::stackswitch::x86_64::wasmtime_fiber_start
References

Affected packages

OSS-Fuzz / wasmtime

Package

Name
wasmtime
Purl
pkg:generic/wasmtime

Affected ranges

Type
GIT
Repo
https://github.com/bytecodealliance/wasmtime
Events
Introduced
d3f444c876d71724dca6b40a58a55e8a450a7967
Fixed
eb7a3f61290ac9e82fe7d760fb569bb3f3fc657a

Ecosystem specific 

{
    "severity": "MEDIUM"
}

Database specific

source 
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wasmtime/OSV-2026-603.yaml"
introduced_range 
"40da1d8c83e2c5e35ab5245ff4b7a5a9592422c1:d5f1b973e48b0016a2cd1190985c9fa509bf0cee"
fixed_range 
"3250c98a2d60f87897d29ff3547ec5463ff245c4:eb7a3f61290ac9e82fe7d760fb569bb3f3fc657a"