CVE-2026-115384

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Source
https://cve.org/CVERecord?id=CVE-2026-115384
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115384.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115384
Aliases
Downstream
AZL (4)
UBUNTU (1)
Published
2026-10-22T19:13:51Z
Modified
2026-10-30T02:30:50Z
Severity
  • 9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
Summary
Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow
Details

Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115384.json"
}
References

Affected packages

Git / github.com/bytecodealliance/wasmtime

Affected ranges

Type
GIT
Repo
https://github.com/bytecodealliance/wasmtime
Events
Introduced
56b81c98a2b4bfea4e7b1d6ac8f2e4196dc83fc1
Fixed
d02ffd202850007ea953224f589a569e8830eb6c
Introduced
17830bd3c0331d920a8aa38846eebc4d46d98c23
Fixed
3c8a3e79aa3188a1a12b3aebbaa097abccceac92
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "39.0.0"
                },
                {
                    "fixed": "48.0.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "49.0.0"
                },
                {
                    "fixed": "49.0.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

v49.*
v49.0.0
v49.0.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115384.json"