Description
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.
References (1)
Core 1
Core References
Exploit, Issue Tracking, Third Party Advisory
https://github.com/WebAssembly/binaryen/issues/1900
Scores
CVSS v3
6.5
EPSS
0.0014
EPSS Percentile
33.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-476
Status
published
Products (1)
webassembly/binaryen
1.38.26
Published
Aug 22, 2023
Tracked Since
Feb 18, 2026