CVE Feed

    Dashboard / CVE / CVE-2020-18378

    CVE-2020-18378

    A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in wasm/wasm-s-parser.c in Binaryen 1.38.26. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as demonstrated by wasm-as.

    Published:Aug 22, 2023
    Last Modified:Nov 21, 2024
    EPS:Aug 22, 2023
    EPSS Score:0.0022
    CVSS Score:6.5

    Affected Products

    Vendor
    Webassembly
    Product
    Binaryen

    Exploits

    https://github.com/WebAssembly/binaryen/issues/1900https://github.com/WebAssembly/binaryen/issues/1900

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-8257 (CVSS 1.9) — A vulnerability was detected in WebAssembly Binaryen up to 117. This issue affects the function IRBuilder::mak…
    CVE-2025-14957 (CVSS 1.9) — A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLoc…
    CVE-2025-14956 (CVSS 1.9) — A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmB…
    CVE-2020-18382 (CVSS 6.5) — Heap-buffer-overflow in /src/wasm/wasm-binary.cpp in wasm::WasmBinaryBuilder::visitBlock(wasm::Block*) in Bina…
    CVE-2021-46055 (CVSS 5.5) — A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder:…
    CVE-2021-46054 (CVSS 5.5) — A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder:…
    CVE-2021-46053 (CVSS 5.5) — A Denial of Service vulnerability exists in Binaryen 103. The program terminates with signal SIGKILL.…
    CVE-2021-46052 (CVSS 5.5) — A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::Tuple::validate.…
    CVE-2021-46050 (CVSS 5.5) — A Stack Overflow vulnerability exists in Binaryen 103 via the printf_common function.…
    CVE-2021-46048 (CVSS 5.5) — A Denial of Service vulnerability exists in Binaryen 104 due to an assertion abort in wasm::WasmBinaryBuilder:…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High