CVE-2020-36402
CVE-2020-36402 is a high-severity vulnerability in Soliditylang Solidity with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (57th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Soliditylang Solidity
- Published:
- Last modified:
Description
Solidity 0.7.5 has a stack-use-after-return issue in smtutil::CHCSmtLib2Interface::querySolver. NOTE: c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e is cited in the OSV "fixed" field but does not have a code change.
Frequently asked questions
- What is CVE-2020-36402?
- Solidity 0.7.5 has a stack-use-after-return issue in smtutil::CHCSmtLib2Interface::querySolver. NOTE: c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e is cited in the OSV "fixed" field but does not have a code change.
- How severe is CVE-2020-36402?
- CVE-2020-36402 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-36402 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-36402?
- CVE-2020-36402 affects Soliditylang Solidity. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-36402?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-36402 published?
- CVE-2020-36402 was published on 2021-07-01 and last updated on 2026-06-17.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26997
- https://github.com/ethereum/solidity/commit/c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/solidity/OSV-2020-2131.yaml
Affected products (1)
- cpe:2.3:a:soliditylang:solidity:0.7.5:*:*:*:*:*:*:*
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