CVE-2026-54912

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Source
https://cve.org/CVERecord?id=CVE-2026-54912
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54912.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54912
Aliases
  • GHSA-jjv3-x3jf-cg49
Published
2026-11-05T17:29:18Z
Modified
2026-11-05T21:32:25Z
Severity
  • 8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
WAMR fast interpreter loader heap buffer overflow via constant deduplication mismatch
Details

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to 2.4.5, the two-pass fast interpreter loader in core/iwasm/interpreter/wasm_loader.c can make inconsistent constant-table decisions between the sizing pass and the emitting pass. After duplicate constants inflate the first pass beyond the constant-slot limit, wasm_loader_get_const_offset emits later constants inline, but the between-pass sort and deduplication reduces the table so the second pass can choose table references and cause reserve_block_ret to emit additional copy operands that were not included in code_compiled_peak_size. A crafted module can therefore make the second pass write partially attacker-controlled compiled-code data beyond the heap buffer allocated from the first pass's size calculation during wasm_runtime_load, before guest code executes. This can corrupt host heap metadata and deterministically crash the process, causing denial of service; further consequences depend on the host application's heap layout. Builds using WAMR_BUILD_FAST_INTERP=1 are affected; disabling the fast interpreter avoids the vulnerable loader. This issue is fixed in version 2.4.5.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54912.json"
}
References

Affected packages

Git / github.com/wasm-micro-runtime/wasm-micro-runtime

Affected ranges

Type
GIT
Repo
https://github.com/wasm-micro-runtime/wasm-micro-runtime
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
25bd7eb63e828e4bd242cc9b38d260b4b31c6605
Fixed
b1353b5e8983047ff68829c99abf1355d5f389cf
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.4.5"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "b1353b5e8983047ff68829c99abf1355d5f389cf"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "WAMR-2.4.5",
            "range": [
                {
                    "fixed": "25bd7eb63e828e4bd242cc9b38d260b4b31c6605"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

Other
01-12-2020
WAMR-01-18-2022
WAMR-01-29-2021
WAMR-02-18-2020
WAMR-02-27-2020
WAMR-03-05-2020
WAMR-03-19-2020
WAMR-03-25-2021
WAMR-03-30-2020
WAMR-04-15-2020
WAMR-04-15-2021
WAMR-05-18-2022
WAMR-06-15-2020
WAMR-07-10-2020
WAMR-08-10-2021
WAMR-09-08-2020
WAMR-09-29-2020
WAMR-12-30-2021
tag-11-28-2019
WAMR-1.*
WAMR-1.0.0
WAMR-1.1.0
WAMR-1.1.1
WAMR-1.1.2
WAMR-1.2.0
WAMR-1.2.1
WAMR-1.2.2
WAMR-1.2.3
WAMR-1.3.0
WAMR-1.3.1
WAMR-1.3.2
WAMR-2.*
WAMR-2.0.0
WAMR-2.1.0
WAMR-2.1.1
WAMR-2.1.2
WAMR-2.2.0
WAMR-2.3.0
WAMR-2.3.1
WAMR-2.4.0
WAMR-2.4.1
WAMR-2.4.2
WAMR-2.4.3
WAMR-2.4.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54912.json"