SB2023091467 - Off-by-one in Wasmtime
Published: September 14, 2023 Updated: April 23, 2026
Security Bulletin ID
SB2023091467
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Off-by-one (CVE-ID: CVE-2023-41880)
The vulnerability allows a remote user to cause incorrect computation results.
The vulnerability exists due to an off-by-one error in the Cranelift code generator for the WebAssembly i64x2.shr_s instruction when compiling WebAssembly on x86_64 with a constant shift amount larger than 32. A remote privileged user can execute a specially crafted WebAssembly program to cause incorrect computation results.
This issue is not an escape from the WebAssembly sandbox and affects only x86_64 hosts.
Remediation
Install update from vendor's website.