CVE-2025-47774
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-47774
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-47774.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-47774
- Aliases
- Published
- 2025-05-15T17:38:58.487Z
- Modified
- 2025-12-02T20:05:03.037584Z
- Severity
-
- 2.9 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator
- Summary
- Vyper's `slice()` may elide side-effects when output length is 0
- Details
-
Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, the
slice()builtin can elide side effects when the output length is 0, and the source bytestring is a builtin (msg.dataor<address>.code). The reason is that for these source locations, the check thatlength >= 1is skipped. The result is that a 0-length bytestring constructed with slice can be passed tomake_byte_array_copier, which elides evaluation of its source argument when the max length is 0. The impact is that side effects in thestartargument may be elided when thelengthargument is 0, e.g.slice(msg.data, self.do_side_effect(), 0). The fix in pull request 4645 disallows any invocation ofslice()with length 0, including for the ad hoc locations discussed in this advisory. The fix is expected to be part of version 0.4.2. - Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47774.json", "cwe_ids": [ "CWE-691" ], "cna_assigner": "GitHub_M" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47774.json
- https://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/builtins/functions.py#L315-L319
- https://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/codegen/core.py#L189-L191
- https://github.com/vyperlang/vyper/pull/4645
- https://github.com/vyperlang/vyper/security/advisories/GHSA-3vcg-j39x-cwfm
- https://nvd.nist.gov/vuln/detail/CVE-2025-47774